I was never able to get 5L03 back on the drive. Someone here sent me a flash file for it but it would not recognize my drive. I really wish I had save 5L03 from the drive.
If you get a chance could you use the Flash Utility and read your firmware back to a .bin file and post it here?
Sorry did not answer your question. With 5L06 firmware, read speed about 8X and some of my media does not write quite as well. I would reccomend maybe not upgrading to 5L06 and wait for something later. My problem is that Liteon does not seem to every release standalone flashers any more and the Smart Update utility never finds a later version even thought I know some have been released.