The G.E.C.K. editor has been crashing after you've installed Fallout: New Vegas patch 188.8.131.525? Fear not, Bethesda Softworks has released an updated version, which can be downloaded from the official site. Now go back to making awesome mods (has anyone put the cazaclaws in the game yet?)
As for the patch itself, it's available for the PC and PS3 internationally now, with the Xbox 360 version still waiting for release.