Paul tries to make sure that new releases arent forcing us all to flash every 5 minutes, so keep that in mind

You might TRY flashing the Twilight kernel while keeping ACE as the ROM.. On Syndicate ROM bluetooth dialing works, but they dont say whether its the ROM or the kernel that fixes it specifically.
Keep in mind- that ROM has WAY more bugs than ACE, including one that locks the phone if you try to charge it while its off. Id recommend ACE, but perhaps swap the kernel and see if that helps? I just reflashed over to my Syndicate copy to check, and bluetooth dialing works for me...
Paul- i know youve got a million things to do (in life and on this ROM), but if the bluetooth dialing function is important, you might check Syndicate and find out how they fixed it. I for one dont use it, so just a friendly suggestion
**EDIT** Clarification: ACE ROM V1.7 uses Genocide 0.3a as its kernel. Syndicate ROM Frozen uses Twilight Zone as its kernel. I merely suggested trying Twilight Zone under ACE to see how it performs in terms of bluetooth dialing. You can find Syndicate over at the XDA-developers forums