I would just like to chime in with the 'me too' on the problem of it showing Yesterday when it should say Today. I dont know if it might be interfering, but we also have
this hack installed.
On another note, is there any easy way to get it to not log the unknown spiders? It seems to be picking up regular users that are using non-standard user-agent strings and filling up the database to the point of making us hit php's execution time limit when trying to view the page.