oouyeee, it's positive fb decreasing file size 1,6mb to 48kb. let people upload large file but downloading small size, that was briliant, and saving alot of diskspace, time, bandwith etc,,,,,
Ben, I can't reproduce the issue with images on forum on our site and I have not met any other users with the same issue, so there is not way I can check why this is happening only with you.
Possible reason is CloudFlare storage used on our site. May be they don't have server where you are located and that is why connection when uploading images breaks.
Answering your last question.
>>How to automatically resize every uploaded image >800x600px to
800x600px and saving after resize image, and leave <or=800x600px as
it is.
GD library is not used for images attached via media panel ( like on on our forum).
So to add a resizing, you will need to modify the source code ( media_panel.php under ow_system_plugins/base/controllers is a good place to start with).
Easiest solution in your case is to set max_upload size limit in admin panel>>settings>>user settings>>content input>>Maximum upload file size
Ben, while testing your issue I have found out that images uploaded via media panel get larger once they are uploaded to the server ( almost by 30-40%). I suspect that this could have caused issues with large images on your site ( even if you are uploading 1.6 mb image, it is getting almost 2.3 on the server). I have passed this over to developers. Will keep you posted.