I seem to have a problem, I am getting an error like this:
Error - 2012-12-19 16:21:52 --> 2 - include(): Dynamic inheritance detected for class model_blog in /home/test/public_html/fuel/core/classes/autoloader.php on line 282
I think it is produced by APC (I run PHP 5.3.19 & APC 3.1.13).
You have to be careful using tools like APC for opcode caching in a development environment. It can cause all kinds of issues due to discrepancies between the compiled cached version and the modified version on disk.
This is most likely the cause of the warning. If you restart APC and test again, you do still have the warning?