We have one silverlight application that will crash Internet Explorer 8 and 9 with a division by zero error in npctrl.dll only when IE is run on a VM and the silverlight version is 5 (silverlight 4 doesn't crash on the VMs) . When we run IE with silverlight 5 on "bare" metal PC's and Servers we can not reproduce the crash. We've tested this with Workstation 8 and vShere 4 and 5 using Windows 2008 R2 servers and Windows 7 all 64bit.
The crashes don't occurr everytime, sometimes it take dozens of attempts to reproduce, they tend to occur when rapidly moving between tabs or when large record counts are returned to things like pull down lists.
Has anyone had similar issues with silverlight 5? Could this be a driver issue? I didn't see anything in the KB or download that looked relevant.