Created attachment 433682 [details] Screenshot The style of the resizer of a textarea is not always consistent. Look at a couple different textarea resizers and notice how some look like 3-2-1 dots and others look like someone had been tapping a pen on a piece of paper. Screenshot is during the same browsing session, using windows 7 so drag a tab to a new window and did the little drag the windows to the side to keep both in focus at the same time thing.
Created attachment 434049 [details] [diff] [review] inherit -moz-resize instead of the special check Looks like the 'placeholder' anonymous div is creating a scrollframe as well. Instead, we'll just inherit -moz-resize on the one scrollframe and disable it on the placeholder.
Comment on attachment 434049 [details] [diff] [review] inherit -moz-resize instead of the special check r=dbaron If you want, feel free to also change the code to cache either (a) a pointer to the |const nsStyleDisplay*| or (b) the value of its mResize rather than calling mOuter->GetStyleDisplay() multiple times. (GetStyleDisplay() isn't quite as trivial as you might think, although it should never be too bad the second time.)
Haven't seen the blurry icon today so verifying fixed using Mozilla/5.0 (Windows; U; Windows NT 6.1; en-US; rv:1.9.3a4pre) Gecko/20100324 Minefield/3.7a4pre