I have installed IE7 7.05730.11 on a laptop and desktop system, both running XP Pro. On about 10% of web page Saves - as an MHT file only - IE7 locks up, while showing 0% of document is saved. Cancels of this dialog do not work immediately, and sometimes never. XP continues to function normally and I can open other instances of IE7 while the original lockup continues. The Save on some web pages never locks up, others pages lock up occasionally (one time), and still others lock up consistently (every time). Are there any solutions or updates on the way? How can I report this serious bug to Microsoft?