It is a pure bugfix release:
Welcome to phpMyAdmin 3.5.6, a bugfix release. 3.5.6.0 (2013-01-28) - bug #3593604 [status] Erroneous advisor rule - bug #3596070 [status] localStorage broken in server status monitor - bug #3598736 [routines] Editing a procedure with special characters - bug #3600322 [core] Visualize GIS data throws Fatal Error - bug #3599362 [core] Double-escaped error message - bug #3776 [cookies] Login without auth on second server
