The best way to post them here on the forum is to use Photoscape (free download, I use it). The perfect size for the forum is 800x600pix. I use the software to clean them up, correct the color, sharpen the image and reduce it down to the size listed. This will drop the size of the file down to less than 300kb. There is a server limit per file of 1mb that is causing most of the issues with image uploads. Give it a shot and let me know.