this problem in the version 1.174
<display html5rendermode="1" usedesktopimages="false" mipmapping="auto" devices="retina" hardwarelimit="920" />
<preview url="panos/example/preview.jpg" />
<mobile>
<cube url="panos/example/mobile_%s.jpg" />
</mobile>
iphone and galaxy nexus so on... don't load mobile jpg
but 1.169 not problem
thanks for your help~~