I just got the following message configuring kdelibs:

checking for aRts-0.7.1... configure: error: aRts 0.7.1 not installed in =
the=20
same prefix as KDE!
Please reinstall aRts in the same prefix as KDE, different prefixes are n=
ot
supported right now.

(kdelibs prefix is /opt/kde3, aRts prefix is /opt/kde3/)

Note that one prefix ends with '/', the other not. The trailing slash sho=
uld=20
be stripped before comparison.

-John