Fantastic stuff! I have a couple of issues though...
I'm getting this error message when trying to create a graphical chart:
Warning: imagepng(): Unable to open 'generated/posters.png' for writing in /libchart/classes/PieChart.php on line 367
Yes, I double-checked the permissions of 'generated'
I also have a thread showing up twice with different statistics in the list. If I were to take a guess, I'd say it was because I moved the thread (can't remember if there was a redirect, can't find one). It looks to me like it's treated the before/after move as two separate threads despite the fact the older one no longer exists.
And just a small suggestion, would be nice to have the Pie Chart option greyed out when it can't be used.
Thanks for the mod!