This list comes courtesy of Conturmalis on REmodding, so many thanks to him.
Source -
http://residentevilmodding.boards.net/thread/4156/resident-evil-steam-fixes-thread?
Bugs remaining after Patch#1
Stages.
• Chapter 6-1: Ship Deck. Sometimes Majini with a key-card can't jump down after spawn and you can't kill him to get a key-card.
Fixed -
http://residentevilmodding.boards.net/thread/4418/
• Desperate Escape Stage 1. Some enemies, like a Chainsaw Majini or Gatling Majini, can't get out from the container.
Fixed -
http://residentevilmodding.boards.net/thread/4447/
• Ugly waves in Chapter 2-1: The Port (not a stage bug actually, vfx bug). Not fixed.
http://www.mediafire.com/convkey/f5aa/1hhd9pkg7dkv638zg.jpg <<Screenshot.
• Chapter 3-1: Marshlands. Area with crocodiles on the east. After restart from the checkpoint, crocodiles enemy set will be cycled to infinity respawn. Changing stage files doesn't help. Not fixed.
• Chapter 3-1: Marshlands. North area. If you place the mines before picking up the quest item, they will disappear while cutscene playing and appear after cutscene's end. In GFWL version, mines will stay in the cutscene and enemies will hitting mines in cutscene. Not fixed.
• Chapter 3-2: Oil Field - Refinery. Restart from the checkpoint, after killing one or both Chainsaw majinies, will cause enemies, that you've killed before, to respawn. Not fixed.
• Mercenaries. Container's collision bug in the Ship Deck stage. Not fixed.
Misc.
• Games for Windows Live is required to launch and play the game. FIXED by Mulac.
• Unable to give or request weapons from AI partner in campaign. FIXED by Mulac.
• Region lock when searching for the game lobby. FIXED by Mulac.
• Loosing equipped weapon after death in versus mode (except Jill BSAA). FIXED by Mulac.
• The game shows incorrect country flag when you host a game session and when you upload scores to the leaderboards. FIXED by Mulac.
Mulacs Fixes...
http://steamcommunity.com/app/21690/discussions/0/541906989413705982/
• Slots scheme always sorted for gamepad usage in mercenaries and all Gold Edition content. In GFWL version they are switching if you are using keyboard and have numerical scheme ON.
• Turning ON anti-aliasing will result black outlines on the characters and objects.
• Static title screen. "Resident Evil 5" title is not animated.
• Private slots when hosting a Mercenaries, Mercenaries Reunion, or Versus lobby doesn't work properly. Client accepting invite (or choosing "join game" when selecting friend in steam) will get a "The player limit has been reached" message.
• During the chapter result screen in co-op, if one player chooses "OK" and second player lets the 60 second timer run out, the game will soft lock for both players.
• When hosting a LAN-only server, friends can still join via the internet by sending them invite or having the friend choose "join game" when selecting you in steam.
• Lost in Nightmares static camera angle Easter egg (interact with front door 3 times) isn't fully playable with mouse and keyboard controls (aiming gets stuck to middle of screen).
• Collision bug, where players and enemies could get stuck in geometry at framerates above 30 is mostly fixed, but it can still happen when playing at 120fps, and it has a very low chance of occurring when playing at 60fps. Its behaviour is now identical to how it was in the GFWL version.