We invite you to update your Gephi installation to profit from latest fixes and new metrics features. To do so, please go to Help > Check for Updates in Gephi.
Patrick McSweeney has been working to bring new network metrics to Gephi:
That are really useful and widely used metrics, if you want to propose new ideas, a forum topic is dedicated for New Metrics. Please join the discussion.
In addition to other small improvements in the statistics package, he also fixed graph distance memory issues. Average Path Length and Diameter metrics are now working fine.
In the meantime we are working on the toolkit project, which will be announced soon.