Why is "Copy BibTeX to clipboard" deactivated after edit?

[Robby Stephenson]

On Monday 16 April 2007, Norbert Nemec wrote:
> every time I edit an entry, the menu option "Collection|Copy BibTeX to
> clipboard" is deactivated. I first have to move the cursor to another
> entry and back again to reactivate this menu entry and do the copying.

Something is clearing the selection. I don't think it used to do that. I'll 
try to fix it.

Robby