Originally Posted by BobbyBlunt
You can try it but do so at your own risk. It may work really well, but it may also lead to other unseen issues. It is worth a shot, especially since you own True Blue. Sadly there are many BluRay movies that do not work under CFW (just from what I have seen, I use a stand alone player) Also if you ask around the IRC you may be able to find someone that can help you recover BD playback. Many people have lost it, and later recovered it.
I have had the blue ray problem and at first I thought I was just out of luck but since then I have tested about 10 cfw's and reinstalled ofw a couple of times and magically my ps3 started to play them again when i went to ita fw but then went to rebug and not tb it still worked. I just installed rogero 3.1 tonight just tested and blu rays still plays. So try installing ofw then a trusted cfw again