Ok this is what I've noticed.
I have some files (CR2, DNG etc) that I import using the anyFile plugin. (I don't need a preview just a generic icon). When I look at the HTML source code the image src links to i.php?... instead of the cached file.
for example:
`[img]/gallery/zp-core/i.php?a=Others/Image/cr2&i=_%7Bplugins%7D_%7Bclass-AnyFile%7D_cr2Default.png&w=420&h=200&c=1&cw=420&ch=200&q=75&t=1&wmk=![/img]`
When I visit this link directly the i.php file redirects me to:
`/gallery/cache/Others/Image/cr2/_%7Bplugins%7D_%7Bclass-AnyFile%7D_cr2Default_w420_h200_cw420_ch200_thumb.png`
So, yes... it creates the cache file, but instead of loading it, it keeps re-creating it?
In the meantime, I decided to downgrade (once again).