User-Agent: Mozilla/5.0 (Macintosh; U; PPC Mac OS X Mach-O; en-US; rv:1.8.0.1) Gecko/20060214 Firefox/1.5.0.1 Build Identifier: Mozilla/5.0 (Macintosh; U; PPC Mac OS X Mach-O; en-US; rv:1.8.0.1) Gecko/20060214 Firefox/1.5.0.1 On my Mac, page up and down do work, but for the previous tab. It appears that focus is not shifting when another tab is selected. This is new behavior on the branch nightlies. Reproducible: Always Steps to Reproduce: 1. Open Firefox to any page with links 2. Command-click to open link in new tab 3. Page down using keyboard or scroll wheel Actual Results: Current tab did not scroll. Look at previous tab. It has scrolled while you were looking at the other tab. Expected Results: In 1.5.0.1rc1 it worked as expected, when I select a (new) tab focus shifts to the selected tab. Under no circumstances should page down scroll a background (invisible) tab. Selecting a (new) window works just fine.

*** This bug has been marked as a duplicate of 327139 ***