I had the same problems under Slackware 10 after installing freetype 2.1.9 with bytecode hinting. The problems seems not to be related with bytecode hinting per se, but with the use of a different version of the library. Slackware 10 uses freetype 2.1.7 and there must be incompatibilities between the two.
To fix the problem go to your trusted Slackware 10 mirror (see http://http://www.abnormalpenguin.co...re-mirrors.php
for a list) and download the original Slackware sources (located somewhere in /source under /X)
You need to download 3 files:
The later is an official Patrick build script that does everything. What you need to do is open the tar.bz2, make the necessary changes to enable bytecode hinting and the compress the archive again as tar.bz2. Place the three files in a directory and as root give:
Everything works like a charm.