jtara - 5:03 pm on Nov 2, 2007 (gmt 0)

Well, I think the mystery has been solved - it was the battery!

I did think of that possibility, but relied on the battery strength indicator in the Logitech applet. It said the battery was good, so I believed them.

Anyway, the applet finally told me to replace the battery, I did, and the problems went away.