I've been playing with RTM for a few days now, and I have to say I'm loving it so far.

I'm not sure if this is just me, but as of today I keep getting pop-up message boxes saying 'undefined' at random intervals (sometimes within a few seconds of each other, sometimes many minutes). I can't see that it's anything in particular that I'm doing that triggers this - like I say, apparently totally random.

I'm not seeing anything flaky in the Firefox error console. The annoying thing about these pop-ups is that they are modal and it interrupts whatever I am doing, like half way though typing out a task or note. Whatever I type up that point is saved but it's an extra annoyance to have to go back and edit it.

If it's any help at all, the pop-up's title bar says 'The page at https://www.rememberthemilk...'. The window can't be resized so I can't see any more than that.

Any ideas?