Before adding this to the tickets on open.silverstripe.com I was wondering what the reports section in the cms (stable 2.2.2) is supposed to do and if I am the only one where it doesn't work and gives me a fatal error
"Fatal error: Class 'Report_StatsReport' not found in blablabla\cms\code\ReportAdmin.php on line 70"
Are you using the stable version (0.5.2) or a trunk version of the module?
The reports section of the trunk version doesn't work, I read it's being redesigned for the next stable release (0.6). I believe the fix mentioned above is only for the stable version, which is why the line numbers mentioned in the fix don't match with what you're looking at.