It does it in the editing box for me in my updated FireFox browser, and it's very annoying.
p.s. This also seems like further non-scientific evidence support the theory that most dev shops hate keyboards and/or literacy is almost over, in world-historical terms. At this rate, in another decade or two MS Office will include a new app that makes PowerPoint look like a stone age tool when it comes to making both speakers and listeners feel unjustifiably smart.
