X-Server problems in Ubuntu 10.04 release candidate

The release candidate of Ubuntu 10.04 published on Thursday, apparently contains a bug in X-Server. A Launchpad bug report, [KMS] gem objects not deallocated, describes the details. The bug makes itself felt as a slowly growing memory hole in X-Server. After a few hours of operation, so much memory is taken up that X11 becomes noticeably slower and eventually the computer is no longer operable.