The Pitt bugs

Problems retrieving your gear

 * If, after your third fight in the hole, you do not retrieve your gear, but instead talk to Ashur, it might lock you in to Haven and you will be stuck.
 * When you get your equipment back after the arena fight and use the "Take All" option you will only get some of your ammo back and almost none of your "Aid" items. If you select them one at a time, there seems to be no issue.
 * If you don't loot all your gear from the safe outside the Pitt BEFORE choosing which side you want to be on, the safe will disappear and all your gear in there will be forever lost. Additional info: this seems to occur even before you make a choice, possibly once you get to Haven. Right after getting the quest bit to retrieve your gear, the safe isn't where it was originally located at. It is instead located in the footlocker right outside of the entrance to the Arena.
 * Some items might not appear in the footlocker after completing the fights and similarly, new items might appear.
 * For some people, if, after the third fight in The Hole, you don't retrieve your gear, then complete all three quests, it is no longer in the footlocker. Verified (possibility)

NPCs not unlocking the gate

 * Faydra may not unlock the gate.
 * Issue where after talking to Faydra about fighting, the gate behind her closes and is locked. She can get stuck in the gate, but the gate remains locked and un-pickable.

Radio station glitches

 * Upon entering The Pitt through the tunnel, both Enclave and GNR stations disappear from the Pip-Boy and never return. Upon returning from The Pitt, any radio or jukebox that normally plays either station will no longer do so.
 * After installing the game, you will sometimes receive Wehrner's radio signal twice. This also means there are two Wehrners, twice the number of Raiders, and two identical quests in your log. This can be fixed by completely removing and then reinstallingThe Pitt from your hard drive.
 * Sometimes after downloading The Pitt Wernher's radio signal won't show up at all. Thus, you won't be able to start Into the Pitt, and this effect may be permanent even if you do delete and re-download it.

Temporary effects become permanent

 * When entering The Pitt, and then returning to the Capitol Wasteland, some perks such as the Animal Friend and Bloody Mess seem to be disabled for the entire duration of the game?
 * Using any form of alcohol like Beer can cause the effect to become permanent.

Companion waiting glitches

 * If the player sends dog meat's puppy to vault 101 before talking to werhner after getting the slave outfit, werhner will repeatly say "theres one last thing before we go" and the dialog ends there. This leaves the player with no way to start the pitt other then having dog meat's puppy rejoin your party.
 * Temporary followers such as Red, Shorty, Sidney, Sticky can appear in The Pitt when you use fast travel.
 * In the tunnel at the start, Wernher tells you that you have to leave your companion behind, even if your companion is not with you. If you left Fawkes in Megaton, for example, you get a message saying that he has returned to the Museum of History. Apparently, the game checks to see if you have a companion but does not check to see if you have left him somewhere. Also confirmed with Jericho as it states he's "returned to Megaton" even if that's where he was left "waiting".
 * After downloading Broken Steel and going to The Pitt and coming back to the Wasteland for about a week, it will say that all of the followers have gone back to where they came from (Butch returns to Rivet City, Dogmeat returns to Vault 101, etc.) and if you go to the places were they went to you can ask all of them to follow you and they all will say yes and follow you if you have the right karma level for each one.

Unable to complete Ashur storyline

 * If, after your third fight in the hole, you do not retrieve your gear, but instead talk to Ashur, it may lock you in to Haven and you will be stuck.
 * Being hasty while talking to Ashur (I.E if you try to jump ahead by directly talking to Sandra) repeatedly can cause him to enter a loop in which he does not move and only repeats the phrase "Don't let me keep you" over and over again. He will say another random quote when you try to talk to him, but will not move for anything, and will simply keep saying "Don't let me keep you". You cannot talk to Sandra during this time, and your only options are to kill him (raiders turn hostile, and you have to kill Sandra to get baby), or leave. It is unknown whether or not leaving after he enters the glitch will cause further problems. Also, while the glitch has yet to be linked to a specific action, it is best for you to just play the scene through as naturally as possible, and if you are doing the scene for the second time, to not try to do it faster.
 * The player may become unable to talk to Ashur in the Haven Building and can only continue after stealing the cure.
 * If you enter Ashur's room and then leave, go get your gear from the chest near the arena, and return to Ashur's room, Ashur might not engage in dialogue with you forcing you to kill him and his wife, then taking the baby and leaving.
 * If you side with Ashur and enter the Haven to finish the quest "Free Labor" you may get locked into the Haven and not be able to exit. Solution is to re-load a previous save BEFORE entering the Haven.

Unable to complete Werner storyline

 * When given the task to retrieve your equipment, Wernher can actually fall off the map and result in the loss of all of your equipment. Due to the fact it resides within his inventory, he spawns outside of the map or does not communicate with you and will not transfer items.

Exploits

 * It is possible to get into the pitt with all of your standard gear. There was a way that required you to drop your stuff at the gate, and then pick it up after Mex 'takes' all your stuff. Then you were supposed to pick it back up and continue through the pitt. This way was patched. The unpatched way to do it is to drop all your stuff near the train car that you travel on to get to the pitt. Continue playing until you discover the Steelyard. From this point you can fast travel back to the train car and grab your stuff. Then just fast travel back to the Steelyard.
 * If you kill a raider/slaver then go into Midea's headquarters, and kill the rest of them in there, Ashur will remain friendly, so long as you do it before his speech. This will save a lot of time (and ammo/stimpaks) if you choose to side with Wernher. Also this will get you some good weapons.
 * Confirmed that it works on the xbox 360 goty edition, with all the content installed, and if you had wherner conceal a gun on you, in theory it should work with the knife as well, any way, go through the dor after all your gear is stolen, drop your weapon and ammo, (Don't move any more than needed, if you see the raider interogating the three slaves the door will lock behind you) turn around and head back through the door, than go through it again, drop your weapon and ammo, thand repeat the process, do it as many times as you wish, be carefull though, the game might freeze on you, not only do you get all the ammo and guns you dropped, but when you retrieve your stuff, you will find a bunch of 32 pistols and ammo in your locker.

Map marker glitches

 * Installing The Pitt causes User placed map markers to cease functioning correctly in a large area around Megaton, Merseti Train Yard, Agathas House, The Bethesda Ruins and Wheaton Armory i.e the map markers send the player in the opposite direction or halfway around the map when all the player wants to do is move a few feet (confirmed). Also when you go in to Megaton its self, even if you've previously 100% explored it the bottom 1/4 of the map will be blacked out and when you go by the Women's Washrooms the whole Megaton map reverts to "unexplored" status. (Confirmed on Xbox 360 & PS3)
 * Placing a Marker when you're in The Pitt and then return to the Capital Wasteland (and Vice Versa) a marker will appear somewhere on the World Map.

Terrain Glitches
It is a possibility that after downloading or re-downloading The Pitt that areas within the Steel Mill will de-solidify allowing the player to get outside the area of the map with ease, though when getting higher in the Steel Mill, it becomes impossible with the loss of footing higher up making certain ingots impossible to locate. This error does not correct itself nor does it change upon starting the game over or reloading a save. The only way to fix this problem is to replace your pit download.

(Addition) This can be fixed without having to reinstall the download. You can use a gun to shoot the path ahead of you. This will help you indicate whether or not the path is solid or not. If you come to a part that isn't solid, save your game in a new slot. Then exit to the menu and reload the save game. This should force the path in front of you to become solid. This effect will not always last however.