Weee, I did something helpful :)
I fixed PHP's FriBidi extension. This involved a lot of source-reading, as FriBidi lacks a decent up to date documentation.
By doing this I also closed 2 (!) bug reports :)
There's no school next week so i'll have time to implement some more things i want in the extension (and also converting it to the new parameter parsing API).
See http://cvs.php.net/cvs.php/php4/ext/fribidi for the code, btw.