What's your current PDM version? Use 'sh ver' to verify it.
Based on Cisco field notice below, it has to do with PDM:
PIX Device Manager (PDM) versions 3.0(1) , 3.0(2), 4.0(1), and 4.1(1), and IDS Device Manager (IDM) version 5.0(1), are incompatible with Java Plug-in versions 1.4.2_08 and 1.5.0_02 or later. If these Java Plug-ins are used in conjunction with the impacted PDM or IDM releases, the application will not load.
We have configured the outside and inside Interface with official ipv6 adresses, set a default route on outside Interface to our router, we also have definied a rule , which also gets hits, to permit tcp from inside Interface to any6.
In Syslog I also se...