Dear Jim Parkhurst, It may depend on video card and video drivers and/or amount of memory/video memory. 9 years ago there was vulnerability in Internet explorer with displaying scaled image: http://securityvulns.com/advisories/ie5freeze.asp results were also different on different hardware. In some cases even mouse cursor was frozen and reboot was only option. --Wednesday, May 27, 2009, 7:56:56 PM, you wrote to cert@xxxxxxxx: JP> If I understand the process, saving the text at [IV. Proof of JP> concept] (following the "~~~..." to an .XHTML file, and launch the JP> file using Firefox, I should lose functionality ("Browser doesn't JP> respond any longer to any user input, all tabs are no longer JP> accessible, your work if any (hail to the web 2.0) might be lost.") JP> Using FF2.0.0.20 and the file does not result in loss of use. JP> All tabs are functional. All JAVA links continue function. Same JP> result for naming the POC file to .HTML, .HTM. >>>> Thierry Zoller <Thierry@xxxxxxxxx> 05/26/2009 13:13 >>> JP> For those that failed to reproduce, try naming the POC file with an XHTML JP> extension. -- Skype: Vladimir.Dubrovin ~/ZARAZA http://securityvulns.com/ Машина оказалась способной к единственному действию, а именно умножению 2x2, да и то при этом ошибаясь. (Лем)