The release of Nvidia driver 185.13 was a bit confusing to me, because I couldn’t find any change log, which describes, what have changed, or added to the new release. Only after browsing and searching nvnews.com I’ve found the statement, that a bug with Compiz was fixed, and it’s now possible to use Nvidia VDPAU in conjunction with the Compiz Desktop without a significant CPU load (~50%), what is good news of course. The information I was actually looking for, was the explanation for the version leap from 180.xx onto 185.xx. The explanation of AaronP (Nvidia employee) is this:
The links in the enumeration above were added my me, and are based on my own understanding. Please also regard, that they are only valid a few days, and should be treated as a snapshot of the current situation. I don’t know what exact problems lead to this rearrangement (one could comb through the forum of the nvnew.com), but to be honest, I’m now more confused, than I was before. I think, I’ll keep using the 180.xx branch, until I read something really plausible and convincing.