Unfortunately it's not working after the update to the newest version. The classes are there links appear correctly but when clicking a link (in my case) Set as Secondary Image - nothing happens... there must be a small issue that I am missing - as far as I am concerned it is somewhere in the Set/Remove part with the Ajax handler.
Although I am not a specialist and I can't say for sure.
I double checked it with WP 3.2.1 and it works flawlessly which probably means that the bug comes from the changes made to the newest version of WP.
If any of you guys knows what is the issue behind it, let me know.
Thanks in advance - other than that - Great plugin - Great job !