Yeah, I noticed that when using it on the nano. So annoying that whole new problems show up on the player that doesnt show up on the simulator. It was doing the popping thing on mine to the clock and the track remain time as well!
Anyway, Ive played around with the wps, seems to work now so re-download the nClix theme zip and all should be well.
http://forums.rockbox.org/index.php?topic=7021.msg58692#msg58692Its best to completely reset the nano, and delete the
.glyphcache files in the rockbox folder. I had weird font corruption happpening so just copy over the fonts again if that happens.