JLeuze thank you for this lovely plugin.
I recently started having problems with the last step in adding a slide "Use as featured image". I'm able to upload the file and see the thumbnail in edit slide screen, but when I click "use as featured image" the link turns to Saving... and just hangs there and doesn't return to Done...
My site is a multisite installation of WordPress and I was able to add a few slides before this happened.
I've checked that I have title for the slide and that the images I'm uploading are the same size as meteor settings.
Can you suggest other things to try?