If anyone is having the same problem as me (resized image links are broken in the mobile version because resized images are JPG, not PNG) I have a band-aid solution for you.
1. Go download and install Rereplacer
www.nonumber.nl/extensions/rereplacer
2. Create a new item in Rereplacer
3. Put this in the Search field
(src="[^"]*/Resized/[^"]*.)png
4. Put this is the Replace field
5. Check YES for Regular Expressions, check ONLY for Enable in tags, check YES for Limit to Tag selection and in the tag selection box, put this
This will replace all links to /Resized/IMAGENAME.png with /Resized/IMAGENAME.jpg
This works for me because all my resized images are jpgs.