Working on a test...hold on.
Okay, I couldn't figure how to write a GWTTestCase for this because the formatter applies to the text the user currently has selected. I didn't see anything in the existing RichTextAreaText that covered formatters/text selection. So I manually verified that the getBackColor patch works in FF in a modified Hello example. http://gwt-code-reviews.appspot.com/1662803/ -- http://groups.google.com/group/Google-Web-Toolkit-Contributors