UPDATE 2: We have published 5.2.12 incremental and full versions. These include all security related enhancements as well as the missing file that triggers the version increment.
Please Note: if you downloaded 5.2.11, your update is incomplete. Please deploy 5.2.12 to ensure the software version increments properly. Version 5.1.13 was not affected by this packaging deficiency.
UPDATE: We've identified a missing file in 5.2.11 which causes the version number not to increment. All security...
Read more @ http://blog.whmcs.com/?t=80615