jcoronella - 6:30 am on Mar 24, 2005 (gmt 0)

num= can be set to change the number of results per page.

I'm not sure all the cases when it is set, and it doesn't have to be set to show alternative number of results per page - it definitely dirties the data slightly, but not much. (looks like num is set about 2% of the time)

One case it is set is when a user with an alternate number of results set goes to the second page of the results. That is, if the user has the number of results set to 100, you will see num=100 variable when they are coming from the 2nd or 3rd page or when they click 'previous' from page 2.