What about not being able to sell the Left Eye of the Falmer to Delvin if you sell all the other larceny targets to him? Or not being able to sell the Right Eye at all to Delvin...

Also, thieves guild hoods are invisible on my character, and I can also equip a helm on top of my thief hood and guildmaster hood.

On the 360. I'm Guildmaster, have the achievement and all. Couldn't find Karliah anywhere. Not in the Guild, Nightingale Hall, The Sepulcher, or in the camp at Snow Veil. So I went into the Snow Veil dungeon. Nothing had reset, so it was an uneventful trip. Found her in the room where she had the cut-scene with Mercer. There is a gate at the top of the stairs, behind a sarcophagus. She was stuck in the gate. I have no idea why. When I talked to her, she said "What brings you back to Nightingale Hall?"

Beyond the gate is an exit to Skyrim, that comes out just to the west-northwest of the initial entrance. Went back some time later and she was still there.

I can't find a portal between the Hall and the Sepulcher either.

Something is wrong with my Sepulcher also. The moon pedestals are gone, and the Evergloam in the middle has changed to what it looked like before I put the Skeleton Key in. I can see the slot for the key, but the key isn't present. The doorways no longer glow blue either. I can still change my powers though, so it's just cosmetic, not a big deal.

I've been using the treasure vault to store things, gems, ingots, all kinds of stuff. I just lay the stuff around, stack up the ingots, pile things in the chests. I have a few torches sitting around to light up the place. No one goes in there and messes with the stuff, and it doesn't disappear. It's beginning to look pretty cool.

Delvin calls me boss, and the new Dunmer calls me Sera, but otherwise all the others haven't changed. The only one that bothers me is Dirge. If he calls me the Guild Masters favorite and threatens to crack my skull one more time...

Pretty obvious that the entire thieves guild is egregiously incomplete and was very rushed. Karliah shows up for the guild master ceremony then walks all the way back to "The Frozen Hearth" in Winterhold for some reason. Tons of people still refer to me as a protege and there's no portal from the Nightingale Hall to the Twilight Sepulcher. Very silly, and mods are going to have to fix it...if the creation kit is ever released, that is...which at this point seems like it might take another year.

In my game that door is locked again now that I'm the Guild Master, and I can't seem to get it open. You might not want to store your stuff in there.

I know I'm taking a chance, but my character is loyal to the Guild, and it just seems so right to rebuild the treasury. I'm having fun doing it. It's been over 20 hours of game play and I haven't had a problem. I don't consider the stuff I put in there mine anymore anyway. All my invaluable stuff goes in Honeyside, so even if it does bug out on me I'm cool with it.