Sometimes. Doesnt happen much but does happen. Usually i crash more moving from one area to another (like entering a dungeon, etc) This usually occurs more when other people are about such as if we do a guild hunt.
Probably has to do with some people using KR, and some using 2d, and some incompatability issue not resolved. Since it happens more duing guild hunts moving from say Umbra into Bedlam, i assume its because of some incompatability. But who knows. I do know i never used to do it.