When I try to sync 1Password 5.4.2(504207) on my iPhone 6 with 1Password 5.4.BETA-16 (540016) the application on the MacPro crashes, locks and pops up a Problem Report and the iPhone app says to "Please unlock 1Password on your Mac 1Password encountered a problem."
Part of the Problem Report from the Mac is below:
OS Version: Mac OS X 10.10.3 (14D136)
Report Version: 104
Exception Type: SIGABRT
Exception Codes: #0 at 0x7fff9995b286
Crashed Thread: 8
Application Specific Information:
*** Terminating app due to uncaught exception 'NSInternalInconsistencyException', reason: 'Item 9F58041217814D63A72EE2BE350E8C93 with category UUID 099 is invalid: missing key.'
I attempted powering off the MacPro and iPhone, rebooting the Airport Extreme and then powering the MacPro and iPhone back on. Same results.
1Password Version: 5.4.BETA-16
Extension Version: Not Provided
OS Version: OS X 10.10.3
Sync Type: Wifi