Description of problem:
In presto.conf it is possible to set the option keepdeltas, but if this is set to false, presto will not delete the deltas anyway.

The implementation is in /usr/lib/yum-plugins/presto.py :

        # Check to see whether or not we should keep the drpms
        delete = not conduit.getConf().keepcache
        if conduit.confBool('main', 'keepdeltas'):
            delete = False

So delete = False independently of the value of keepdeltas.

Version-Release number of selected component (if applicable):
yum-presto-0.6.2-2.fc14

How reproducible:
Always