1. Compose message in gmail (in rich text formatting mode). 2. Type enough text (with spaces) to cause the text to wrap. 3. Highlight the text and click Remove Formatting button (Tx). 4. The text now all appears on one line (if it doesn't happen the first time, highlight it again and click the button again). It doesn't do that in other browsers (and is really annoying). All of the spaces have been replaced with non breaking spaces.
Confirmed with a local debug build of WebKit r26851 with Safari 3 Public Beta v. 3.0.3 (522.12.1) on Mac OS X 10.4.10 (8R218). Works as expected with Firefox 2.0.0.7.
Does this bug still reproduce? I think it has been fixed.
I'm pretty sure this was fixed a long time ago.