Our patch system keeps a detailed changelog of sorts -- or at least something that can be thought of as one. However, we don't keep track of user-visible changes in any purticular way, and the reasons logged probably won't make much sense without a good knowladge of the internals.

...and now that I think about it, you are a member of pmdev; go to patch lister, select all of the names in "applied by", and hit "filter". Read away.

(Hopefully this hasn't been superceeded by later posts since I wrote it -- I just woke up and noticed I never hit submit last night.)