From Bugzilla Helper: User-Agent: Mozilla/5.0 (X11; U; Linux 2.4.4 i686; en-US; 0.8.1) Gecko/20010421 Description of problem: The drop-down lists in the package selection cannot be opened with keyboard navigation. How reproducible: Always Steps to Reproduce: 1.select "customize packages" 2.try to open a list with keyboard alone Actual Results: You can navigate with tab and arrow keys, but space/enter do nothing with the closed lists. Expected Results: It should be possible to open the sub-lists with the keyboard alone. Additional info: Using text mode is a perfectly good workaround.
In GtkTrees, the "+" and "-" keys are the default for expanding and collapsing tree branches. Try this and I think it will work just fine. Thanks for your report.