This morning around 1 AM Pacific time I attempted to do an extensions upgrade. The process was very slow and I ended up aborting it. This left my USB stick missing MPlayer, getflash, and several gtk2 extensions. When I tried manually downloading these a single extension would download and then the download would halt with a wget or http error. Eventually I was able to complete downloading and now it looks like everything works on my box.
Just wondering if anyone else had similar problems. Probably a mistake to interrupt an extensions upgrade, but possibly it was running slow because of the server glitches. Hopefully these were temporary.