**Short description of error**
Just downloaded Blender 2.76-RC1 and wanted to copy previous settings. It took a very long time (NFS mounted home) so I looked in ~/.cache/blender/2.75 and found a cache dir 53GB(!) in size, that was being copied over.
1. Why is this cache dir here in .config/blender dir, and not in /tmp?
2. If the cache dir needs to be in the config dir, why isn't it cleaned periodically?
3. Why is this cache dir being copied over to the new config dir?
**Exact steps for others to reproduce the error**
Open a new version of Blender (2.76-RC!) for the first time. Copy previous settings. Cache dir is copied over, so depending on size can take a long time.