[PGLightbox][user management] several errors...

Gallery version (not just "2"):2.2.4
Module / Theme name & version: PGLightbox
PHP version (e.g. 5.1.6): 5.0.4
PHPInfo Link (see FAQ):
Webserver (e.g. Apache 1.3.33): Apache NOYB
Database (e.g. MySql 5.0.32): MySQL 4.1.15
Activated toolkits (e.g. NetPbm, GD):GD, ImageMagick, mostly default + PGLightbox must haves
Operating system (e.g. Linux):Linux (webserver)
Browser (e.g. Firefox 2.0): Firefox 2.0.0.11/IE6/7
CMS (e.g. Joomla! with a version): Joomla! 1.0.13 Stable with G2 bridge 2.0.14 beta

So the above installation is used, perhaps something should be updated, I try to keep it as new as I can (the webserver is not our own, so I can't update PHP, databases)
Several errors keep occurring in the gallery.
- one of them starts when trying to go to the gallery from joomla! Using a user unknown yet in the gallery, I get this result:
=========================================
An error occurred while trying to initialize G2
Error (ERROR_MISSING_OBJECT) : Missing object for 132

* in modules/core/classes/GalleryStorage/GalleryStorageExtras.class at line 2075 (GalleryCoreApi::error)
* in modules/core/classes/GalleryStorage/GalleryStorageExtras.class at line 98 (GalleryStorageExtras::_identifyEntities)
* in modules/core/classes/GalleryStorage.class at line 298 (GalleryStorageExtras::loadEntities)
* in modules/core/classes/helpers/GalleryEntityHelper_simple.class at line 71 (GalleryStorage::loadEntities)
* in modules/core/classes/helpers/GalleryEntityHelper_simple.class at line 127 (GalleryEntityHelper_simple::loadEntitiesById)
* in modules/core/classes/GalleryCoreApi.class at line 2298 (GalleryEntityHelper_simple::loadEntityByExternalId)
* in modules/core/classes/GalleryEmbed.class at line 215 (GalleryCoreApi::loadEntityByExternalId)
* in modules/core/classes/GalleryEmbed.class at line 120 (GalleryEmbed::checkActiveUser)
* in /home/httpd/vhosts/3dstudio.nl/httpdocs/components/com_gallery2/classes/core.class at line 206 (GalleryEmbed::init)
* in /home/httpd/vhosts/3dstudio.nl/httpdocs/components/com_gallery2/gallery2.php at line 25 (core::init)
* in /home/httpd/vhosts/3dstudio.nl/httpdocs/index.php at line 235
=========================================
(synchronizing users doesn't really work, but I suspect it to be a bridge bug, so I posted that at the bridge forum)

- Another of them is when editting an item or album, and clicking to return to the gallery, it shows an error message _G2_WRONG_ITEMID (this happens only when using the gallery in the CMS.) The breadcrumbs do work correctly however!

- when editting an album > theme > for instance changing a block (removing rating interface) and saving, it shows "Succesfully saved theme settings" but nothing changes...the removed item is back again..

- sometimes after changing something and trying to return to the album, it shows a grey page with some text...but I haven't found when it triggers, as soon as I will, I'll post it here.

Does someone have any idea what might be happening? And/or more important, how I can fix it

kind regards!