I use Advanced searches to check for duplicates, and with 4.2, when I open Advanced search, then I have preselected "Red Hat/Red Hat Enterprice Linux 5". If I change it to "Fedora/Fedora", the I see a high CPU usage and browser lockup for ~5 seconds, and the list of components changes, though it's not complete. For example, there should be component evolutin-ews, or evolution-mapi, but it's not in the list. The previous version, with a button "Update component list" didn't suffer of any of these two issues.

Also, when I unfold "Detailed bug Information" section, then the entry for "Keywords" is misplaced and hides other elements. making window wider doesn't help.