after i replaced file i missed that permissions changed... then i had to reset default to get everything working :/ bluetooth stopped working and i had terrible glitches and freezes.. even when i changed to 644... so secont time i just added media_rw line by editing permissions.xml and now it worked flawlessly
I noticed that even now when i have rw acces to sdcard not everything is working as in 4.3 - for example solid explorer does not see by default external sdcard :/ but it is only beta so i can live with it
I have the same problem as you, what have you added and where exactly?
Thank you