[eluser]sharif.macky[/eluser]
I also have the same problem after upgrading to 2.0.2 all I see is the message "Unable to locate the specified class: Security.php". My log file doesn't help much either:
DEBUG - 2011-07-07 12:36:19 --> Config Class Initialized
DEBUG - 2011-07-07 12:36:19 --> Hooks Class Initialized
DEBUG - 2011-07-07 12:36:19 --> Utf8 Class Initialized
DEBUG - 2011-07-07 12:36:19 --> UTF-8 Support Enabled
DEBUG - 2011-07-07 12:36:19 --> URI Class Initialized
DEBUG - 2011-07-07 12:36:19 --> Router Class Initialized
DEBUG - 2011-07-07 12:36:19 --> No URI present. Default controller set.
DEBUG - 2011-07-07 12:36:19 --> Output Class Initialized
Anybody worked out what is causing this yet?