I experience two "oddities" when using Font Book, neither of which has any damaging effect on font management. But my curiosity is such as to whether others might be experiencing the same.
a) When I undertake a "Resolve Duplicates" all of the duplicates are indeed resolved with the exception of Geneva. If I then open Geneva I find that there are are two instances of the font. If I then select just these two instances and apply the "Resolve Duplicates" action then the resolution takes place.
Subsequent to installing Adobe's Creative Suite 2 (I have now upgraded to Creative Suite 3) the icons for my font collections are now the icons normally used by Adobe Bridge. Other than the icon change there appears to be no problem and the collections respond to the Font Book "Enable" and "Disable" actions in a normal way.
-- James Leo Ryan ..... Austin, Texas ..... taliesinsoft@mac.com