Images only uploading if Image path is left empty

Hi!

I'm facing a strange issue here. I've created two imagefields in two different content types that are working fine, except for some "unspecified error" that I get sometimes when I upload an image. I had specified different "Image Path" for both imagefields.

Then I've created a third imagefield in a third content type, also specifying a different "Image Path" for this content type. In this case, although I can send the image and preview it before saving the node, when I actually save it the image doesn't get saved. I am only able to save the image if I leave the "Image Path" empty for this, and only this, content type.

In all three of the imagefield's "Image Path" I've used a syntax like "directory/[user-raw]"

The first two imagefields use the default image feature (I've manually created the directory for this, as stated in one forum topic here).
I've tried to use the default image feature in this third imagefield in order to try to get it working, but the problem remained.

My Drupal environment is the following:

Drupal: 5.7
PHP: 5.2.6
MySQL: 4.1.22-standard-log
CCK: 5.x-1.7
Imagefield: 5.x-2.1
Permissions for the "files" directory: 777
Permissions for the "temp" directory: 777
Download method: public

Thanks in Advance,
Carlos.