0 A.D. game. It doesn't crash with master branch of standard mesa. Also note that my RV530 only support GLSL 1.20 (dunno if your branch require a GLSL 1.30 compatible card).
OK, the crash only appears when compiling your code with --enable-debug . Then 0ad starts fine, however it's missing water (e.g. in Oasis map).
Wow, I just spent several hours of my life tracking down the issue with the Nexuiz title screen and the 0 A.D. water (same issue), and the patch that finally fixed it is a whopping 13 lines long.
Anyway, both are now fixed by a14d10973e77895c9c4f.
Which apps/games look differently with your special mesa branch? How often do you update from mesa master? Should games run faster?