Don't be a lagopus!
22 March 2014
There may be issues with the cairo drawing functions used by alopex and some nvidia drivers. Unfortunately I have no way of tracking down this issue. If you have a nvidia card, either 1) use the FOSS drivers, 2) use another WM, and/or 3) help pinpoint if and where the issue lies between cairo and nvidia and report it to their devs.
There is a known bug with gtk3 windows not being drawn. This is next on my chopping block and a fix can be expected soon.