After fiddling with various pieces of the system for a weekend, I now suspect the visual pager, used to switch among virtual desktops, as the culprit.
CNN: Corel Linux 1.0 is praiseworthy but flawed
If you experience this problem, I suggest you refrain from ever using the visual pager, and instead simply click on the numbered buttons to switch from one virtual desktop to another.
应用推荐
模块上移
模块下移
不移动