Thanks to Dominik Higer, i report this interesting email about erratic IE8 crashes.
I couldn’t reproduce the problem reliably. It seam’s that affected workstations / users after some retries overcome the problem.
Deleting logicaldoc-enterprise-core.jar from Java Cache and removing the accepted logicaldoc certificate from the application seem to help with this:
Changing the HeapSize as suggested didn’t seem to affect our problem.
The IE8 crash issue now is solved!
Thank’s for your Help.