If you have shell access to your web root and ImageMagick installed, run the following command to trim all your JPEG filesizes and prevent potential Windows IE problems. First cd to the web root, then type:
find . -name "*.jpg" -print -exec /usr/local/bin/mogrify +profile "*" {} \;
/usr/local/bin/mogrify is where my mogrify command is located; it may be different on your system. Just do a locate mogrify to see where it lives.
Depending on the size of your site, it may take a while. you may also want to search for *.JPG, as the find comand is case sensitive.

