I ran V1.4 off and on for several years and upgraded to 1.5 about a year ago on a fairly new decently performing system... Most difficulties have been caused by operator error, with an occasional curve ball thrown by the program, but never having to do with targeting.
If your system is screwing up with auto targeting, something clearly isn't right. FWIW, I have great success using auto targeting and the O'Kane method for manual shooting.
Hopefully the experten on the thread will have some nugget of information for you...