[SLUG] middle button copy/paste fails

[david <david@xxxxxxxxxxxxx>]

I'm used to selecting text and then pasting using the emulated middle 
mouse button on a two button mouse.

This works most of the time but occasionally stops working and worse, it 
does unpredictable things until re-boot, which is truly annoying. I'm 
using Ubuntu 9.10

Does anyone have any suggestions why this happens and what to do about 
it apart from logging out/in?

thanks

David.