Personal Space pages - layout problem in Chrome

Using Chrome (v.22) in Windows 7 - in Personal Space pages, the Edit/Share/Add/Tools buttons wrap to the right (the Tools button gets kicked to the next line). The Profile box gets pushed to the left, which squishes the page content. This doesn't happen in IE 8 or the latest Firefox. It also gets fixed if you switch the space theme from "Global Look & Feel" to "Documentation". I've looked thru all of the layout/theme settings for our site & we don't seem to have anything custom going on.