We are going to migrate our Apache 2.0 to Apache 2.2 finally. I am only worried about the mod_rewrite changes that 2.2 might have gotten. Did anyone notice any problems when switching? Any particular problems with rewrites? Anything that behaves differently now?
Not a lot changed of consequence, really; some reorganization of modules and changes to a couple defaults. Nothing that I know of in mod_rewrite.
Review here for a summary of the changes from Apache.