Well, I still don't have found why, but it seems that some members have trouble when the upload png files.
When it happens, can you please try this trick and post the result back below ? Thanks !
- when you upload a png image, you get a 'Connection was reset" error - or perhaps a message ""your attachment couldn't be saved. This might happen because it took too long to upload or the file is bigger than the server will allow"
- just try to upload a jpg (or a gif ?) image
- then try again with the guilty png file.
It did work on my tests... but I'm not 100% sure.
Thanks for helping with your results !