I've only updated my laptop and not my desktop in case anything is wonky. Have only hit one serious snag so far, but I don't run the QT client on my laptop; I run Multibit. And Multibit ran fine on Mountain Lion but does not run on Mavericks10/23/13 5:11:55.813 AM

Dock[453]: LSOpenFromURLSpec(file:///Applications/MultiBit.app/) failed with -10658

That looks like it could be a JDK issue but I am kinda stumped.