Starting with ISE 10.1, has begun migrating some hard-IP simulation models from Smartmodel to "SecureIP." For now, the SecureIP blocks can only be simulated in 1 simulator: Modelsim 6.3c (or later)
" AR #30975 - 10.1 SecureIP libraries - Does NCSIM and VCS support Secure IP flow?"
Ok, so I guess the question is, when is ISE 11.1 planned for release? Also, will the Aldec simulators (Active-HDL, Riviera) be supported, too?