startkde assumes that df produces output in standard form (i.e. $BLOCK_SIZE or 
$DF_BLOCK_SIZE isn't set to human-readable or si) and that the noclobber shell 
option isn't set

Version-Release number of selected component (if applicable):
kdebase-2.2.2-1

How reproducible:
Always

Steps to Reproduce:
1. arrange for "export BLOCK_SIZE=human-readable" and "set -o noclobber"
to be in a start-up file that is processed when the startkde script is
loaded (~/.bashrc will probably work, I don't really understand how bash 
decides to load these files)
2. run startkde

Actual Results:
The script dies because $space_tmp and $space_home aren't purely numbers
(they have letters like "M" or "G" in them).

If you fix that, the script dies because
"testfile_tmp=`mktemp /tmp/KDE.startkde.XXXXXX`; echo TEXT_TEXT > 
$testfile_tmp" doesn't work with noclobber set.

Expected Results:  Everything Just Works (TM).