I just realized that I’ve been making a critical error. I’m still in the "web designer" mindset, so I try to make all of my images as compact and as efficient to load as possible. To acccomplish this, I’ve been using Photoshop’s "save for web" function. This holds whether or not the image is to be used on a website or on Flickr. Unfortunately, this strips all of the EXIF data (as well as any other metadata) from the image. I’ve got to get out of that habit.
I’m not going to try to fix all of my images. I should have the original JPEGS saved somewhere, so I’m going to go back to my favorites and replace a few photos on Flickr. I’ll try break out of that web geek mode, and start thinking like a photographer. Heck, Flickr gives me virtually unlimited storage and automatically provides several options for image size, so the "save for web" function is almost overkill anyway.