Scheduled cache update and quality improvements. Now particular times with various periods can be defined starting from minute and ending to year. See below.
And you can always see full change log of Accelerator for WordPress.
- Scheduled cache update.
- Sometimes PHP warning 'Cannot modify header information' appears in admin mode.
More information can be discovered in the original post about New version 2.16 released - Accelerator for WordPress and on the main site.