I haven't try beta 1, but on beta 2:
pretty much scan and print does not work except bundled apple application; the new office 2015 work but the old one (2011) does not work.
Komodo IDE, coda, chocolat,devon think, ultraedit, fine reader .... all fail along the line of
Crashing on exception: *** -[NSKeyedUnarchiver initForReadingWithData:]: incomprehensible archive version (-1)
which seems to make the call from AppKit
0 CoreFoundation 0x00007fff94135a55 __exceptionPreprocess + 165
1 libobjc.A.dylib 0x00007fff9394213a objc_exception_throw + 48
2 CoreFoundation 0x00007fff94135905 +[NSException raise:format:] + 213
3 Foundation 0x00007fff95250075 -[NSKeyedUnarchiver initForReadingWithData:] + 3525
4 Foundation 0x00007fff9529391e +[NSKeyedUnarchiver
....
9 PrintingPrivate 0x00007fff956d65a0 -[PKBrowser start] + 79
10 PrintCocoaUI 0x0000000111d72f33 CreateDefaultFileName + 1897
11 PrintCocoaUI 0x0000000111d78790 CreateDefaultFileName + 24518
12 PrintCocoaUI 0x0000000111d78671 CreateDefaultFileName + 24231
13 AppKit 0x00007fff9093827c -[NSWindowController _windowDidLoad] + 592
14 AppKit 0x00007fff9092139d -[NSWindowController window] + 110
15 AppKit 0x00007fff90de7775 -[NSPrintPanel runModalWithPrintInfo:] + 462
16 AppKit 0x00007fff90de68db -[NSConcretePrintOperation runOperation] + 562
17 Chocolat 0x00000001024fedcb -[CHSingleFileDocument printDocumentWithSettings:showPrintPanel:delegate:didPrintSelector:contextInfo:] + 809
18 AppKit 0x00007fff90cc3849 -[NSDocument printDocument:] + 73
1 libsystem_trace.dylib 0x00007fff946477a1 _os_activity_initiate + 75
20 AppKit 0x00007fff909b7508 -[NSApplication sendAction:to:from:] + 460
21 AppKit 0x00007fff909b729f -[NSMenuItem _corePerformAction] + 379
22 AppKit 0x00007fff909b6fd7 -[NSCarbonMenuImpl performActionWithHighlightingForItemAtIndex:] + 114