Hi JB,
You generally need to resize before you post the image. During this process the resizing program you use (I use MS paint but they all do the same thing) will take unneeded or repeating pixels out of the image(very basic explanation of the process). When you try to take this image and resize it back to it's original size the program tries to put the pixels back by copying adjoing pixels (again very basic explanation of the process). It usually does a pretty bad job of it and you end up with an image that looks blocky or pixelated. If your interested in posting an image it is pretty easy. First open your image using an image editor (MS Paint-free and probably already on your computer), when the image opens select resize, I usually change the setting from 100 to 30 and then save. Yours may be dependant on the size of your images so you will need to try different settings. I try to make sure the size of mine are below 200k. When you have the size you want select save as and give the image a new name, If you select save your original image will now be changed to the new size. To post your image in this forum, open up a new thread, select the image icon (looks like a picture frame-ususlly next to the filmclip icon),click on select files and select the location of your saved image, and select upload files. If the image is to large you'll get a message, if it is ok it will upload, then just post your message. Hope this helps you out.
Maddawgs