[IDEA] Thumbnail Image Quality

[christopherr]

There are some inconsistencies in the folder ownership:

Code:

drwxr-xr-x 4 root staff    4096 Nov  5 07:46 imagesw

 but 

Code:

drwxr-xr-x 2 root root  172032 Nov  5 08:47 thmcache

Could it be related to the issue of not being able to remove the images?

After a quick google: 

staff: Allows users to add local modifications to the system (/usr/local) without needing root privileges (note that executables in /usr/local/bin are in the PATH variable of any user, and they may "override" the executables in /bin and /usr/bin with the same name). Compare with group "adm", which is more related to monitoring/security.

Is there a special reason we are using root : staff for folders in /var/local/ ?