I'm running chromium 18.0.1025.39 compiled on Gentoo with jwm 2.1.0 of the same. Whenever something happens that causes the windows title to update, it flickers (i.e. some JS running maybe). I'm pretty sure I've seen other windows do this, but this is the one I've got up most just sitting there
Overall though, I'm pretty happy with this as a minimal/configurable desktop.
Also, is there a mailing list or forum to ask questions at? I couldn't find one, and don't want to open a bug just to ask if JWM can do something. Plus a mailing list you wouldn't have to answer, I'm sure others would chime in at times to answer questions.
Thanks again for the great WM.