I'm preparing patch and we get weird results for last two weeks: This problem seems very very wierd - and it doesn't seem incompatibility of graphic/sound card - it's what i was experiencing yesterday: 1. As you know patch worked on my comp. Yesterday i installed in on new install of 1.0b - and i get CTD I removed sounds - the same - due the eliminations i found that it's causing by Calliope - very weird because this unit is very well done. Without calliope the game runed smoothly. 2. So i prepered new patch without new sounds and without calliope I installed it on v 1.0 - CTD again - using elimination if ound that's made by new buttons!!!! (And there's no .nif wich would be causing problems). Ok i prepered patch without sounds, buttons, calliope. 3. The same - CTD. I start to looking in old files (from 1.0 b) - i cleaned all .nif files from art/interface folders (except nif responsible for main menu) - and the game runs smoothly even when i pasted the same buttons wich was causing problems last time 4. So the next patch i removed all arts and make patch with fixed art folder. Installed it and... yes, you're right CTD!. It's when i lost patience yesterday and went to bed. Ok so we have the same problem in (counting patch 1.1): - V1, V2, Ballistic Missile (i experimented with this in the begining so it might be unstable) - the newest version seemed fixed - BM-13 (also possible, but eliminated doesn't stops CTD) - Sounds (i don't see what might be wrong here) (including .mp3 from working 1.0b version) - Sherman Calliope - i'm sure this unit should work well, if not - the dozens of tanks shouldn't work either - Buttons - ?????? - Old graphic files (.nifs) in interface folder - New movie files .dds (for Colosseum and DNA Project) - http://forums.civfanatics.com/showthread.php?t=212338 - just making the copy of file Civ4_BuildingsInfos.xml in assets/xml/Buildings/ Some people have this bug when installs 1.0b version (just few - so this what happens now it might be old problem, or not connected to the current bug at all). As you can see there is no pattern in this, and i have no idea why it might happen. I post this message here - maybe someone had similliar problem before or might know what's causing this?