I am seeing the error again. It's not in the same area of the site as before, but shows the same error message.
Warning: unlink(image_cache/assets/companies/proportion/logo_philjonesbass_w90_h68/logo_philjonesbass_07250315.jpg) [function.unlink]: Permission denied in /var/www/vhosts/dev.mydomain.com/httpdocs/webassist/caching/CachedResize_Image.php on line 269
Warning: imagejpeg() [function.imagejpeg]: Unable to open 'image_cache/assets/companies/proportion/logo_philjonesbass_w90_h68/logo_philjonesbass_07250215.jpg' for writing: Permission denied in /var/www/vhosts/dev.mydomain.com/httpdocs/webassist/caching/CachedResize_Image.php on line 207
This time it doesn't seem to be related to uppercase file extensions. There are only four images which always show the error. The other images display correctly.
Weirdly, on a different page set-up to show all available images for that section, the ones which normally don't show, do show. ???
Any thoughts very much appreciated.