Version:            (using KDE KDE 3.5.4)
Installed from:    Gentoo Packages
Compiler:          gcc-4.1.1 
OS:                Linux

When trying to compile kde-base/libkcal-3.5.4 on Gentoo with FEATURES=test enabled (which automatically runs "make check"), I get the following errors: 
 
make  check-local
make[3]: Entering directory `/var/tmp/portage/libkcal-3.5.4/work/libkcal-3.5.4/libkcal/tests'
rm -f FAILED; \
for i in `find ./data/RecurrenceRule/ -name "*.ics"`; do \
  perl ./runtestcase.pl testrecurrence "next" $i; \
done; \
for i in `find ./data/RecurrenceRule/ -name "*.ics"`; do \
  perl ./runtestcase.pl testrecurprevious "prev" $i; \
done; \
for i in `find ./data/RecurrenceRule/ -name "*.ics"`; do \
  perl ./runtestcase.pl testrecurson "recurson" $i; \
done; \
for i in `find ./data/Compat/ -name "*.ics"`; do \
  perl ./runtestcase.pl readandwrite "ical" $i; \
done; \
for i in `find ./data/vCalendar/ -name "*.ics"`; do \
        perl ./runtestcase.pl testvcalexport "vcal" $i; \
done;
Checking './data/Compat/KOrganizer_3.1.ics.ical.out':
  Line 29: Expected      : RRULE:FREQ=MONTHLY;UNTIL=20050101;BYMONTHDAY=11
  Line 29: Actual output : RRULE:FREQ=MONTHLY;UNTIL=20050101T000000Z;BYMONTHDAY=11
  Line 111: Expected      : RRULE:FREQ=DAILY;UNTIL=20031210
  Line 111: Actual output : RRULE:FREQ=DAILY;UNTIL=20031210T000000Z

  FAILED: 2 errors found.
Error running testvcalexport
Error running testvcalexport
Error running testvcalexport
Error running testvcalexport
Error running testvcalexport
Error running testvcalexport
Error running testvcalexport
Error running testvcalexport
Error running testvcalexport
Error running testvcalexport
Error running testvcalexport
Error running testvcalexport
Error running testvcalexport
make[3]: *** [check-local] Error 1
make[3]: Leaving directory `/var/tmp/portage/libkcal-3.5.4/work/libkcal-3.5.4/libkcal/tests'
make[2]: *** [check-am] Error 2
make[2]: Leaving directory `/var/tmp/portage/libkcal-3.5.4/work/libkcal-3.5.4/libkcal/tests'
make[1]: *** [check-recursive] Error 1
make[1]: Leaving directory `/var/tmp/portage/libkcal-3.5.4/work/libkcal-3.5.4/libkcal'
make: *** [check-recursive] Error 1

I _have_ read bug #98066. This bug was reported for your information only.