so this just happened
Interesting - well Avast uses the Sciter engine to develop it's GUI (therefore it uses HTML/CSS for the GUI using the engine) so it probably just messed up somewhere for the text value (most likely reads it from a language file on disk) and the CSS positioning.

Since I mentioned that: ESET, Comodo, Bitdefender and Norton all use Sciter also. Avast has been using Sciter for awhile, and before this they used htmlayouts for a very long time (also by the makers of Sciter, now unsupported and development ended).