In the /usr/bin/startkde script, it will hang on the 'random' section of
the script.

f=$HOME/.kde/share/apps/kfm/magic
[ -f $f ] || dd if=/dev/random bs=1 count=16 | md5sum > $f

Should be:

f=$HOME/.kde/share/apps/kfm/magic
[ -f $f ] || dd if=/dev/urandom bs=1 count=16 | md5sum > $f

Note this test:
[root@vnc1-1 bin]# dd if=/dev/random bs=1 count=16 of=foo
0+0 records in
0+0 records out

[root@vnc1-1 bin]# dd if=/dev/urandom bs=1 count=16 of=foo
16+0 records in
16+0 records out


If the startkde script enters this state it will hang.