Upgrage 1.5.1.3 to 1.5.2.1 Errors

I did a test upgrade on a duplicate site of my store and got some errors. Here's what I did:
1. renamed my config files so they won't be overwritten
2. performed upgrade steps 2 through 11

When I launched the store I got two errors. Both are in the same controller file:

Notice: Undefined index: count in /home/modernf2/public_html/shop-test-site/catalog/controller/module/category.php on line 44

And

Notice: Undefined index: count in /home/modernf2/public_html/shop-test-site/catalog/controller/module/category.php on line 66

Both lines 44 & 66 referred to a count check statement as follows: What am I doing wrong or need to do to make it work? Also, what am I gaining by upgrading to 1.5.2.1?

Thanks in advance.

You are doing almost everything right.. the only step you missed was using the "Search" button on the forum to look up that error message. If you had you'd have found posts like this one:
http://forum.opencart.com/viewtopic.php ... 28#p265428

thanks a bunch! That did the trick. I did try searching, but didn't get anything like that ;(