[JKT]

Not something I've experienced, but I don't use the GMail web interface very much at all.

Best thing to do would be to take a sample of the OmniWeb process when this hang occurs and send them to OmniGroup using the Send Feedback... option in the OmniWeb Help menu (you'll have to re-launch OmniWeb to be able to do that of course).

To take a sample, go to your /Applications/Utilities folder and open Activity Monitor. Highlight the OmniWeb process in the list (it will have the OmniWeb icon next to it - sort by name is probably easiest way to find it and select it). Then go to the View menu and select Sample.... Wait for a few seconds for the report to be generated, save it and attach it to the Send Feedback... e-mail with some notes on what you were doing in OmniWeb at the time.

To make your life easier if you end up needing to do this again, customise your toolbar (option at the bottom of the View menu) and add the Sample button to it.