I had a very awfull text on the XP bar: "stairs" effect, nearly unreadable.
I am using Tukui (13.07).
I changed the following in tukui.lua at line 7:
-- st.fontflags = C.media.uffontsize and "MONOCHROMEOUTLINE" or "MONOCHROMEOUTLINE"
++ st.fontflags = C.media.uffontsize and C.media.uffontsize or "MONOCHROMEOUTLINE"
That did the trick and the text is now nice and readable.
Another quick and dirty fix that would need a better understanding of what happened here.