Upgrade to 6.5 - only system module altered??

I have just completed the upgrade of my 6.4 site to 6.5. The result from the update page reported that only the system module had been updated as follows:

The following queries were executed
system module
Update #6048

* ALTER TABLE {menu_router} CHANGE load_functions `load_functions` TEXT NOT NULL
* ALTER TABLE {menu_router} CHANGE to_arg_functions `to_arg_functions` TEXT NOT NULL

Is update #6048 the only one included with this point upgrade? I followed the usual standard procedure replacing all folders and files with the new downloaded package (except for my sites folder, .htaccess, robots.txt file)

Am I missing something?
Ta,
Renaee.