Flash problems when portal rewrite profile is defined but not used

I have an access policy that is used across several different virtual servers, one of which has a webtop and portals defined on it's policy branch. But I'm finding that flash is broken on traffic to another virtual server using the same policy that never hits the webtop/portal branch and shouldn't be doing any rewriting. Just to make sure, I specified the URLs to be rewritten and excluded the others, including the problem virtual.

I'm sure the problem is with the rewrite profile, because if I remove it and the policy branch that has the webtop, my flash problem clears up. Unfortunately, the policy must be shared across both virtuals because of an unrelated external SSO setup.

Any suggestions?