Flashed from 1.3 5x to 1.4 5x, all good.
It is my understanding, that while 1.4 fixes the 359 +1 = 360 problem, there is still an issue with "good kreon rips". There is an uneeded jitter added to some of the CR timers by the kreon fw. This in conjunction with the jitter added from ixtreme, may lead to too large discrepancies. Jitter should only be added once, by the ixtreme fw. Until kreon removes the jitter from his fw, it is advised to use a TSST (360 sammy drive) for ripping SS.
Yes this means even with 1.4, if you want to as safe as possible, you should scrap even " good kreon SS" in favour of a sammy SS.
If you can't remember if you ripped the SS from a kreon drive. You should rip the SS from the retail disk again using a sammy drive, then compare their TRUE CRC. "TRUE", meaning a CRC including the CR timers that can have added jitter. ATM, mulleter and schrtom ignore the jitter in their CRC, which isnt desirable in this situation.
If the true CRC of the SS is different from the SS from your rip, that indicates you rip was form a kreon drive. You should inject the SS from the sammy rip, and reburn.