Also known as Random Member Block, this is an update to v1.0 and was tested on Geeklog v1.3.8. It corrects previously known bugs, degrades gracefully if certain error situations are hit, and cleans up the code.
The script selects a member at random and displays his/her photo and username with a link to the respective profile. Pictures are automatically resized to stay within your pre-defined bounds. GD libraries ARE NOT required for this to work. You can download it here or here.
Here ya go...see if this works for you. I changed the random number generator to a new one.