I rarely crash in any areas unless there are lots of other PCs and there are area effect spells being thrown around, probably due to the high-end game computer and graphics card I run. My son however on his lap-top crashes everywhere in PtoM. Mainly his crashes occur in outdoor areas, and those areas tend to be experiencing rain. Overall I believe the EE rain is the culprit to his crash issues, due in part to the fix he came up with that reduced the crash amounts was to adjust the camera angle so he had less area in the view, and little rain as possible within it.