The focused element on the page should blur when the window blurs and should focus when the window focuses. I'm attaching a simple test case with editable elements. Steps to reproduce: 1. Load the page 2. Click into any of the editable elements on the page 3. Click on different window/tab 4. Click back on the window of the page (e.g. on the titlebar of the window) You should see that blur/focus fired on the element selected in step 2. Safari doesn't fire the focus/blur events here. Firefox and IE both do.
Doh. Apparently I forgot to attach a testcase back in April. *** This bug has been marked as a duplicate of 23763 ***