two admin pages (general and URL rewrite) refuse to save with browser message "Bad Request".

This only happens on two of my "admin" pages.

General Settings and URL Rewrite Administration

Every time I try to save changed settings I get the following message in my browser.

Bad Request
Your browser sent a request that this server could not understand.
Apache/2.2.0 (Fedora) Server at soft-focus-imagining.com Port 80

For url-Rewrite I try the "test page" and both tests pass without issue.

The software is loaded via via fedora and resides in the /usr/share/gallery2 directory.

Other than the above problems the entire admin area is working correctly and my galleries display correctly.

Any clues as to what I should look for? I'm worried I might have changed some PHP settings for another PHP application that is effecting Gallery2

Many Thanks,

Nigel Aves.

(I did hunt for an answer before writing directly, I hope this has not been asked before).

Gallery version = 2.2.5 core 1.2.0.7
PHP version = 5.2.6 apache2handler
Webserver = Apache/2.2.0 (Fedora)
Database = mysqli 5.0.45, lock.system=flock
Toolkits = Dcraw, Gd, ImageMagick, NetPBM, LinkItemToolkit, Thumbnail, jpegtran, Ffmpeg
Acceleration = full/21600, none/0
Operating system = Linux mail.twin-peaks-video.com 2.6.25.10-47.fc8 #1 SMP Mon Jul 7 18:31:41 EDT 2008 x86_64
Default theme = carbon
gettext = enabled
Locale = en_US
Browser = Mozilla/5.0 (Windows; U; Windows NT 5.2; en-US; rv:1.8.1.16) Gecko/20080702 Firefox/2.0.0.16
Rows in GalleryAccessMap table = 30
Rows in GalleryAccessSubscriberMap table = 9008
Rows in GalleryUser table = 4
Rows in GalleryItem table = 8975
Rows in GalleryAlbumItem table = 298
Rows in GalleryCacheMap table = 13625

meteorain, we need more information:
FAQ: What information is required when I ask for help in the forums?
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