Gallery : No thumbs in TinyMCE image picker for some users

[hybrid512]

Hi,

I have a strange problem and I can't find a solution.
I'm using Gallery 1.4.4 and CMSMS 1.9.4.1.

Here is the problem : when a user creates a gallery and add some pictures in it, this same user can pick pictures from these galleries from within the TinyMCE editor in content blocks.
I know galleries are not intended to be some sort of "media library" for TinyMCE but sometimes, you want to pick a picture to illustrate some rich text content and not only use the gallery as a predefined diaporama or so.
The fact is that, only the user who created the gallery can see thmbnails of the pictures he posted in the TinyMCE's image picker.
Let's say user "A" created a gallery with pictures in it, he would be able to see these pictures thumbnails with TinyMCE while editing some content block whereas user "B", even with same permissions and even with admin rights will see the pictures (the files) but not their thumbnails (just the default picture icon).

This is quite annoying since pictures are not always well named and you have to try everyone of them to find the good one.

Any idea on how I can solve this issue ?

Regards.