Now Joomla 3.4.6 and VM 3.0.12 - Thumbs not working (some are, some are not) See Attached with CleanMart and without CleanMart. vintage-antique-jewelry.com
Upgraded to newest version of CleanMart which solved the problem.
Starting with the VM3.0.10+, the image handler has been changed in the VM Core. So, CleanMart needs to be updated to be compatible with newer VM versions as well.