2.0.0 to 2.0.2 upgrade

[eluser]mineass[/eluser]
replaced files and now i receive

Unable to locate the specified class: Security.php

logs:
DEBUG - 2011-06-09 12:58:18 --> Config Class Initialized
DEBUG - 2011-06-09 12:58:18 --> Hooks Class Initialized
DEBUG - 2011-06-09 12:58:18 --> Utf8 Class Initialized
DEBUG - 2011-06-09 12:58:18 --> UTF-8 Support Enabled
DEBUG - 2011-06-09 12:58:18 --> URI Class Initialized
DEBUG - 2011-06-09 12:58:18 --> Router Class Initialized
DEBUG - 2011-06-09 12:58:18 --> No URI present. Default controller set.
DEBUG - 2011-06-09 12:58:18 --> Output Class Initialized
DEBUG - 2011-06-09 12:58:18 --> Input Class Initialized

what is wrong here?

[eluser]mineass[/eluser]
nwm seems ok now ty )

[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?

[eluser]sharif.macky[/eluser]
Ahh... svn merge issue. The Security class has now been moved from system/libraries to system/core. My merge somehow messed up here.