Issue I588 [defect,important,resolved] Fixed View screen crashing in drawing certain PA instance rotations. Affected 7.0.0-220.127.116.11 in rare cases but was more prevalent (and only reported) since 8.0.7-TEST5. Only some PA's tended to be affected. Resolved in 18.104.22.168 and 22.214.171.124. This improvement in theory might also have a very small improvement in particle splat detection in rare cases (Issue I223 - clip detection) because it shares the same code. Reported in a number of 2011 crash reports including http://simion.com/discuss/topic/1223-simion-81047-2012-01-11-bugcrash/ The temporary workaround there was to disable drawing of the affected PA instance (select PA instance on PAs tab and uncheck "Draw").