I haven't been able to reproduce this.
If it still happens for you it might be worth sending a crash dump to GPSoft. Instructions are here: Crash dumps for bug reports.
If you have anything unusual, and clipboard-related, on your toolbar that might be a factor. e.g. Copy and Paste buttons directly on the toolbar (instead of below the Edit menu). Any other unusual things (like clipboard monitor/history programs which may be changing things, or using the 64-bit version of IE rather than the default 32-bit version) may also be worth mentioning.