Hi,
For those experiencing issues with CKEditors becoming inoperational on WebKit browsers when they were in a hidden div (e.g. on inactive tabs) during a browser window resize event (see http://dev.ckeditor.com/ticket/9715 for details) then I have come up with the following workaround to fix the issue:
$(window).resize(function () {
$('.cke_resizer').mousedown();
});
I came up with the idea because I noticed that the only way to resolve it manually was to tweak the resize handle for the editor and this code was the most succinct programtic equivalent I could come up with.
Tested in Safari and Chrome latest builds as at the date of this posting.
Hope that helps someone!
Cheers,
Rob.