G2 + Drupal - 403.shtml "Page Not Found" Errors

For the most part, my integration works perfectly. I am running Drupal 4.7 and Gallery 2.1. I only have a few issues when I'm working on configuring Gallery2 toolkits. I have short urls on in Drupal and the rewrite module on in Gallery2. All tests pass in the rewrite module in gallery and the Embedded Gallery2 Status for settings > gallery under Drupal come back with Success after it's autoconfigured.

First, the error I get. When I take the below steps, I get taken to a "Page Not Found" message and the Drupal sidebar is shown correctly. My url shows http://www.alpine9.net/index.php?q=gallery and watchdog details the following error:
Type page not found
Date Thursday, October 12, 2006 - 11:40
User admin
Location http://www.alpine9.net/index.php?q=gallery
Referrer http://www.alpine9.net/?q=gallery&g2_view=core.SiteAdmin&g2_subView=ffmpeg.AdminFfmpeg&g2_navId=xb67681f3
Message 403.shtml not found.
Severity warning
Hostname 205.170.147.41

My error log through cpanel only shows one error:
[Thu Oct 12 13:52:14 2006] [error] PHP Fatal error: Call to a member function on a non-object in /home/alpi9net/public_html/gallery2/modules/core/classes/GalleryEmbed.class on line 209

I'm not sure if this is related because I have received the "Page Not Found" error about 10 times today and this is the only line that shows up in my error log.

When I originally configured the netpbm, imagemagic and ffmpeg modules in Gallery, I pointed them to /usr/bin/ or /usr/bin/binary and would get the error when either testing or saving the settings. I had to delete the module and reinstall and it would find the binary just fine. I could also point to /usr/bin (no extra slash) and would get the error. I would be rid of this but now I want to change settings on ffmpeg to watermark existing video files. I'm getting the same error.

I have tried this in Gallery2 directly as well. I can move around in Gallery2 just fine, until I attempt to test or save one of these modules. It then brings me to the "Page Not Found" that is embedded in Drupal, which I find pretty odd. If I were to get the error while working directly in Gallery, that would make sense, but it kicks be back in to the integrated Drupal setup to tell me the error.

Thanks for your help!

Gallery version = 2.1.2 core 1.1.0.2
PHP version = 4.4.3 apache
Webserver = Apache
Database = mysql 4.1.21-standard, lock.system=flock
Toolkits = NetPBM, Exif, Thumbnail, Ffmpeg, ImageMagick, Gd, ArchiveUpload
Acceleration = partial/21600, partial/21600
Operating system = Linux baby.cirtexhosting.com 2.6.17.5-HN-2.3-P4 #1 SMP Sat Jul 15 09:55:04 EDT 2006 i686
Default theme = matrix
Locale = en_US
Browser = Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.8.0.7) Gecko/20060909 Firefox/1.5.0.7