Description of problem:
jorton@jolt:~$ rpm -qf /usr/lib/libecal-1.2.so.7.0.0
evolution-data-server-1.8.1-1.fc6.i386

Clashes for /usr/lib/libecal-1.2.so.7.0.0:
  with /usr/lib/libapol.so.2.4 => yytext_ptr
  with /usr/lib/libkcal.so.2.0.0 => icalmemory_strdup
icalproperty_new_recurrenceid (...1141 symbols omitted...) icalproperty_vanew_
defaultlocale
  with /usr/lib/libedata-cal-1.2.so.6.0.0 =>
TC_GNOME_Evolution_Calendar_StringSeq_struct
POA_GNOME_Evolution_Calendar_CalFactory__i
nit (...119 symbols omitted...)
GNOME_Evolution_Calendar_CalListener_notifyDefaultObjectRequested