First post, so I'll start with a big thanks to Xeno86 for this useful software. Just wanted to report that Firefox 3.6.4 is showing 100% CPU with KernelEx 4.5beta2 on Win98SE. Was installed in XP SP2 compatibility mode. No errors on command line or in the console. The browser works but hogs CPU. Reverting to FF3.6.3 for the moment. Regards.