OHHHHH MAN! SO THATS WHY! Ive played on Steam the whole week after coming back from RE5 on PS3 after a big break... and this fking fire start on PA Top Spawn drove me crazy in the Steam Version. Just played a few games on the GFWL-Version and the starts suddenly work perfectly fine for me, like it used to be on the PS3-Version.
So, +1 for EdgarCamilo. The firestarts really is buggy on the Steamversion, other than the Console+GFWL Version. Havent tested anything else yet though.
They really changed something on the AI of the game, or at least in the way they do actions, like climbing or jumping.