Regarding Matt's use of the .pdf file type for posting pictures...I have zero idea why Charles can't open a .pdf...the program is a free download from the folks that sell the software to make .pdf files. Just about any website that posts .pdf files (such as AMA's site) will provide a link to the download, and it's SAFE TO DO.
I have also wondered why Matt does this, and didn't realize that posting pictures in .jpg format was a problem. Like Mark said, the IrfanView (free) software is out there, easy to operate and any 4 year old can do it! I know this, because I can do it, and figured it out myself. There have been several threads on SH about how to do this, and I think there's a pinned topic somewhere.
I downloaded it from a site called "TwoCows" or maybe "TuCows"...I forget...but it's a download site for Shareware and Freeware, and is a safe place to download from. Resize the picture to 640 to 850 pixels wide, click the box to save aspect ratio, and then "Save As" (compress) at about 75%, and see what happens. You'll need to create a title for the file, and will need to "save as" each variation so that you can tell which is which, and also so you can go back to the original if you need to. I just name the file like "Toucan Matt P.jpg", and the resized & compressed version would then be "Toucan Matt P%.jpg". Creating and typing the title is the slowest part of the process, but I have done pictures in about 15 seconds, using IrfanView. FWIW, all digital cameras I've had (3) came with proprietary software on a CD. I tried to figure out Olympus and again tried to figure out Canon software...nope! My brother tipped me off on IrfanView...I didn't even try Nikon software. IrfanView is "DA BOMB". Got that, NSA?
Some guys who try to post a picture that they reduce to meet file size limits by simply resizing. This isn't good, because the picture is then about half the size of a postage stamp when opened. Yes, you can post it. No, we can't see what it is that you're posting. Should not have to right click on the link or anything of the sort. One left click, and the picture should open! If anybody has questions about working with IrfanView, I'll try to help. Send me an email or PM. No guarantees, however.
Steve