2.7 b3 9841, content underneath sidebar

*pathetic look* Okay, after updating to the latest nightly build (9841), all my admin page content is pushed down underneath my sidebar. The overlap of the content into the sidebar space looks like about two ems or fifteen pixels. I keep my font size set at a minimum of 16pt, in case that makes a difference (and have absolutely zero intention of changing it, I like my eyesight just the way it is). Browser is Camino on a Mac.