Shemeska
Adventurer
How does it look with the World of Darkness games and Shadowrun? Both had major edition changes, too, right? Is it really that much better, or it just less visible because they are less players and less online activity (not to mention EN World activity?)...
I'm not on Dumpshock enough to really comment on any SR3 v SR4 issues online, but I've never seen anything negative between various edition players at conventions. They had a pretty massive turnout for the Catalyst SR Q&A at GenCon, and a raise of hands there was pretty diverse for what edition people were playing, or had started with (as I recall). My current group is using SR3, but I've played SR4 and I can go with either one. I've never been told that X edition of SR sucks, or I'm playing a discontinued edition, or that SR X ruined the game, etc.
However the big difference there is that changes are largely mechanical in nature, while between D&D 3.x and D&D 4e, there are also massive flavor changes to the game itself, which makes for a very different experience. That's why I would expect the community schism between prior editions of D&D and 4e to be on another level entirely versus some other games with different editions.