When creating a new post and selecting "Additional Options"

Announcement Start Date and End Dates. When selecting the calendar icon, the calendar goes off screen far off to right and bottom.

I've inspected with Firebug and FF 3.6. Seems the div the calendar sits in is getting an element style dynamically applied for left and top. Manually changing both of these I can get the calendar to sit where it needs to, but I'm guessing if I add styling for this in a css file either in the theme or my skin and apply !important to left and top, this will become an issue for the forums in other locations.