Printscreen key on your keyboard takes a screenshot. Then open up Paint, paste it in, save it, and upload it online.
If you did a great deal of work in one sitting, it can take forever to patch it out correctly. Sometimes it's better to just do a little vertexing at a time, then export it back out and do it again, continuing. Maybe this is what you're experiencing.
EH, I only do one polygon at a time, but I guess I do ALOT to that one polygon as I vertex the WHOLE body out of that one
I'll try it. Although it's going to be a pain to do it all again