the problems with the revisions are to do with timing errors. Though I have found it hit and miss. I have had mobos that have reported problems with certain accelerators and they have been fine. I think from memory you only really need work if you intend using an accelerator that is at least an 040.
im sure some kind person will post a link to a page that gives you all the info on the revisions and the fixes that may need to be done.
Im lucky I have got a 1A and never has any problems with it
