Comment 58 for bug 580295

@Jan -- since you mentioned "daily build" I presume you are booting images of 11.10 "Oneric Ocelot" and not 11.04 "Natty Narwhal." Since this bug was closed in 11.04 "Natty" you are probably seeing a different issue and you will want to open a new bug against Oneric.

As this old page says there are several places where the Alt-F2 message might be getting lost on your system: https://wiki.ubuntu.com/Hotkeys/Troubleshooting (NOTE a few things have changed since that page was written but it might help give you an idea where to look.) That page is one of many helpful debugging pages listed at https://wiki.ubuntu.com/DebuggingProcedures