Problems with getURL and local frame targeting in FP9

Hi all - have a strange issue that I cant seem to find any help for from other forums (including Adobe forums) so thought I might try here…

I have a two frame page - the left frame is a custom flash Tree object that parses a number of IMS-compliant manifests (basically an XML tree menu structure) and the right frame displays the href of the tree object that is clicked. If i run this from a server, it works fine and displays all links in the right frame. But if I run it from a local or network drive it opens all links in _blank.

Adobe have a technote on the new allowScriptAccess and getURL in FP9 (http://www.adobe.com/go/50c1cf38) but dont mention anything about this issue (that i can locate). I also cannot see how opening all pages in _blank can fix any “security” issues.

Can anyone confirm that targeting html frames locally via getURL under FP9 is now not possible or has been changed? or is this a bug (sorry - undocumented feature)?

Cheers,
Darren