User-Agent: Mozilla/5.0 (Windows; U; Windows NT 5.0; en-US; rv:1.9.2.8) Gecko/20100722 Firefox/3.6.8 Build Identifier: http://www.mozilla.com/en-US/products/download.html?product=firefox-4.0b2&os=win&lang=en-US I get this error message trying to start 4.0b2 after as successful(?) install The procedure entry point RtlCaptureContext could not be found in the dynamic link library KERNEL32.DLL Windows 2000 Advanced Server with SP4 Reproducible: Always Steps to Reproduce: 1. Install Firefox 4.0b2 2. Click on Icon to start it up 3. Actual Results: GPF "The procedure entry point RtlCaptureContext could not be found in the dynamic link library KERNEL32.DLL" Expected Results: Firefox loads This may mean that you need Windows XP or better to run 40.b2 ?