More info: http://blog.whmcs.com/?t=93326
We are pleased to announce the release of WHMCS 5.3.10.
This update contains general maintenance updates for the 5.3 series of WHMCS.
As usual, we are making available both an incremental upgrade version containing just the changed files for those upgrading from the latest current version V5.3.9 and a full release which can be used to perform a new installation or update an existing installation regardless of previous version.