Classic skin windowshade isn't working correctly with either no text seen if the default non-skinned font is being used (can workaround this by enabling the skinned font option on Preferences -> Skins -> Classic Skins though that will affect everything) & the skinned font mode is incorrectly drawing too far on the windowshaded titlebar preventing the minimise & resizing bar from being seen.
Some modern skins may not draw correctly with either partial or completely missing window frames or flashing elements. This seems to be due to a change made on Feb 20th in the interim / beta builds to resolve seeker bar elements along with some other elements not showing as expected in the skins. A solution to keep the prior fix & un-break the skins now being reported as broken is being looked into.