I went through and deleted all of the mytreasures files, including the old databases. I did a clean reinstallation of everything. When I first activated the plugin, on the plugins page, I got this error:
Warning: preg_match() [function.preg-match]: Empty regular expression in /home/.gracious/morbidromantic/morbid-romantic.net/wp-content/plugins/mytreasures/mytreasures.php on line 1001
Warning: preg_match() [function.preg-match]: Empty regular expression in /home/.gracious/morbidromantic/morbid-romantic.net/wp-content/plugins/mytreasures/mytreasures.php on line 1001
Warning: preg_match() [function.preg-match]: Empty regular expression in /home/.gracious/morbidromantic/morbid-romantic.net/wp-content/plugins/mytreasures/mytreasures.php on line 1001
But once I went to the mytreasures tab, the error disappeared and didn't come back when I revisited my plugins page. So, I guess something cleared it up and it wasn't a big deal. :)
Unfortunately, I am still getting empty pages when I add the code. I even added a new media type and put a test single entry into it. All the same, none of my entries show up. I am beginning to think that something must be wrong with my server or something since the script works fine for so many but me. So, that might be it.