OK peeps.... I do not know which version any of you all are using.... but I do not use the superslim version my self i made it but i dont use it i like knowing who or what i casted something onto and since i removed the target line from the superslim version becasue there wasn't enough room.... hence me not using it.... but ne ways i took 4 screenshots 2 with and 2 with out the font file i have my tooltip stuff all turned on and sadly i had no difference....
-proof-
If these are not what your talking about please be further specific if your talking about the hotkeys, knowledgebook, spell effects, ect... ect... ect... that has some tooltips on it i'll gladly run remove my fonts.xml and see if there is a difference but i currently run with the .xml and all my tooltips work (it may just be a setting.... Options->User Interface->Tooltips
make sure all the checkboxes are checked (if you wish none of it is reallly important but since yal are saying the tooltips do not work i sugest it)