When you converted to EXT4 it was only the Data Folder correct? Is this the only directory able to be converted? Dont our apps use other directoryies?
Really offtopic! Thought I'd clear this up though: without root (the superuser popup asking for permission) apps can only write/read data from the data folder, or from the sdcard.
The speed difference between Voodoo and OCLF in specific apps is because of journals and fsync.
Take this to a different topic if you want to reply anymore to this post, leave this post for audio issues please!