[jce76350]

I use the stable release 1.11.3 not the SVN version.

And i'm on a Linux shared host.

Ok some modifications are on the last SVN (next 1.11.4)
On linux with the last SVN all is OK from ImageManager

So
The bug is NOT on Linux but only on windows
* There is a problem with deleting images in ImageManager in Windows
http://dev.cmsmadesimple.org/bug/view/8673

see http://www.cmsmadesimple.fr/forum/viewtopic.php?id=4772