It is NOT a Beryl bug. The problem is TOMBOY! Taking off Tomboy (and
KEEPING BERYL) works just fine.
** Changed in: gnome-panel (Ubuntu)
Sourcepackagename: gnome-panel => tomboy
Status: Rejected => Unconfirmed
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[feisty] Gnome panels and alt+f2 don't work
https://launchpad.net/bugs/84439