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Created attachment 558137 [details] screenshot * New Host dialog. * Enable Power Management. * Change Power Management type via drop-down menu. * Gibberish appears inside the dialog. See screenshot for: part of an IP address at the left side (10.35...) and VMs and percentage at the top right corner.
assuming you tested with FF 8: What happens in FF 9?
No gibberish on Firefox 9/10.
don't see a reason to fix to such an "old" browser...