Hi, good work on a great filter, and I look forward to the D7 release, I still haven't found an effective replacement.
I'm using this filter with ckEditor.
I'm really like the spam link deterrent whitelist, but have just noticed that all relative links in my content are being screened out by the filter.
I can of course add all the links as absolute, but then that will stuff things up when I grab the site to work on it locally.
I have pages that aren't in menus or linked from other places outside the content, so this is really bad for SEO as none of them will be indexed by robots.
I can't see the harm in allowing relative links as they can never link outside the site anyway.
Can this be incorporated into the filter?