I have seen a few addon developers complaining about the "deadtime before the 'real' patch" - which they consider to be the launch of wotlk or patch 3.1 (they seem to think its the same thing). Many of them have to completely rewrite their addons for the current patch without any guarantee that it will work in wotlk.
Going from previous addon-breaking patches I think it's a bunch of whine and the broken addons will probably never be updated.
So I'm now exploring the wonderful world of random addons - as you can see from my screenshot. I'm currently looking for a bloated raidframes addon (im sick of lightweight shit addons, I want it all!).