I didn't have problem to use GEGL operation with a self compiled gimp 2.6.6
(build following the Gimp-wiki tut ,BTW thank to whoever update that page)
Instead Crash occurred always with a previous versio nof Gimp 2.6.6
installed using the official installer.
this on Win XP updated to SP3
No problems even with my previous version of Gimp 2.6.5
(note : i do not consider " problems" rare occasional crashes when
experimenting unknown functions with random setting.
But i had no any problem using Gegl operations in a more reasonable way)
photocomix (via www.gimpusers.com)
Gimp-user mailing list