0.6.3-1 was quietly released a few weeks ago.
To document it: it's a minor release which fixes a single bug in the caching system's timeout. The bug caused cache elements to be removed by default after 9 days of inactivity, rather than the more sensible (and intended) 90.
A cache element's activity is measured by the most recent cache hit for the element.
It is possible to override the timeout by calling
As usual, setting it to -1 or 0 will disable the timeout.