Mavericks 10.9.1 Safari Crashes

Question

Have updated to Mavericks 10.9.1, Safari and Mail frequently crashing 'while using shortcut plug-in'.. HELP    
Process:         Safari [1913]
Path:            /Applications/Safari.app/Contents/MacOS/Safari
Identifier:      com.apple.Safari
Version:         7.0.1 (9537.73.11)
Build Info:      WebBrowser-7537073011000000~21
Code Type:       X86-64 (Native)
Parent Process:  launchd [146]
Responsible:     Safari [1913]
User ID:         501
PlugIn Path:       /System/Library/PrivateFrameworks/Shortcut.framework/Versions/A/Shortcut
PlugIn Identifier: com.apple.shortcut
PlugIn Version:    2.6 (2.6)
Date/Time:       2013-12-19 09:18:46.082 +1000
OS Version:      Mac OS X 10.9.1 (13B42)
Report Version:  11
Anonymous UUID:  DFBCE3F6-7799-C7D7-EC1B-E6D643465F99
Sleep/Wake UUID: 5A5C9090-47B2-4727-9E00-02BB2130768B
Crashed Thread:  0  Dispatch queue: com.apple.main-thread
Exception Type:  EXC_BAD_ACCESS (Code Signature Invalid)
Exception Codes: 0x0000000000000032, 0x00007fff79f070c0

Answer 1

If you don't already have a current backup, back up all data, then reinstall the OS. You don't need to erase the startup volume, and you won't need the backup unless something goes wrong. If the system was upgraded from an older version of OS X, you may need the Apple ID and password you used.
There are ways to back up a computer that isn't fully functional. Ask if you need guidance.
If you installed the Java runtime distributed by Apple and still need it, you'll have to reinstall it. The same goes for Xcode.