I just set up a new virtual machine with an installation of Ubuntu 11.10 desktop edition, and downloaded the xephem 3.7.5 .deb file referenced in the contributions section of xephem's website. I encountered a problem that I haven't seen before in other versions of Linux. The only xephem requester buttons that will work are ones that I can click by pressing the enter key. Clicking them with the mouse does nothing. By extension, it's also impossible to activate any buttons that aren't bound to the enter key. This even includes check-boxes.
Has anyone seen this before?