Its rather simple. Dont try to upload images larger than 125KB. They will not work.
Obviously netetiqite says to have images that are only as big as they need to be to show that your trying to show. If you have a large image but there is only 1 specific part of the image you want people to focus on then crop the image down so you dont have all the extra. If your image is 180
1600 then resize it to 80
If the image is a Jpeg then drop the compression qualty a few points. Save it under a different name if your worried the image will suffer but I can tell you the average human eye will not notice the difference between a image saved with 70 jpeg compression or an image saved with 95 jpeg compression, and the one saved under 70 compression will be much smaller in size.
With that said there is 1 very easy way to get around our little file size limit. If you dont want to be restricted to 125kb then upload your images to your website. Then use the [img] [ / img] tag to link your image from your website to your post. Since your not saving the image to this website your image will not be restricted in size nor will it be thumbnailed when displayed.
Just note that if you do link several large images you should also add to the subject (large photos) or something to that effect to give dialup users fair warning they may be waiting.
I ask that anyone who has a website of theirown that can upload images and store them on THEIR website do this. It will save vaulable disk space on this webserver and it will also give you full and total control over your image sizes.