I took a look at the loop guide and figured it was a neat thing to have. So I successfully made a loop here: http://www.g9core.com/test.php .
However, I tried the "1.5 only" category exclusion, and since 2.0 wasn't included in the loops guide, I figured the guide was old and that this feature was supported in 2.0 as well. Unfortunately, it didn't work: http://www.g9core.com/g9core.php .
What's my problem... or isn't my problem and is WordPress's?