Remove display button is hidden on FF

Using FF2 on WinXP or Mac OS 10.5, if I edit a view, and select a display on the left side of the screen, I don't see the "Remove display" button (see screenshot). This happens if I disable all contrib modules with the exception of views and views ui.

I can fix the problem if, from within firebug, I find the following element at line 558 of admin.css and disable the style:

.views-tabset input, .views-tabset textarea {
  max-width: 95%
}

I'm using the default Garland theme. I don't get this problem from within Safari 3 on the mac.