Imported html emails won't load remote images

Hi,
I’m trying out DEVONthink Pro Office 2.3 in Lion 10.7.2, and one problem I’ve met is that imported html messages from Mail won’t load remote images despite that function being turned on in the prefs panel. I’ve turned off the firewall and can’t see that I shall have other scripts running that would prevent them loading.
Any ideas? A bug?
Best,
SPN