OKay. Going back to 5.06.25, Skada is set up corretly in the infopanel, but I don't get the DPS or Threat registering during a fight. The summary panels just stay there. 5.06.26 gives me the width error. Since it takes a lot longer on this machine for the addons to load, there could be a timing issue. I will look at it some more later.
OK. I hate when stuff like this happens. I deleted all of the windows in Skada (Skada, nUI_Skada1 and nUI_Skada2) and relogged. After doing this a few times, it finally create the windows correctly and the Threat and DPS are showing up as they are supposed to. So, bug is gone (for now).