Existing users, 
To me it looks like this app is the cause for my Safari crashes. Since I don't use 3rd party menu items anymore for quite a while I'm going to remove the menu extras enabler from my system.
From Safari.Crash.log
==================
Exception: EXC_BAD_ACCESS (0x0001)
Codes: KERN_PROTECTION_FAILURE (0x0002) at 0x00000000
Thread 0 Crashed:
0 libobjc.A.dylib 0x908311f4 objc_msgSend + 0x14
Binary Images Description:
0x1000 - 0xb5fff com.apple.Safari 1.2.4 (125.12) /Applications/Safari.app/Contents/MacOS/Safari
0x31a000 - 0x31cfff com.unsanity.menuextraenabler Menu Extra Enabler version 1.0.1 (1.0.1) /Library/InputManagers/Menu Extra Enabler/Menu Extra Enabler.bundle/Contents/MacOS/Menu Extra Enabler
From one of the JavaNativeCrash_pidxxxx.log files:
=================================
Dynamic libraries and executable:
[0x0000a418-0x0008fae0] /Applications/Safari.app/Contents/MacOS/Safari
[0x00326ab4-0x00327a20] /Library/InputManagers/Menu Extra Enabler/Menu Extra Enabler.bundle/Contents/MacOS/Menu Extra Enabler
Menu Extra Enabler
Enable menu extras under Mac OS X.
Version: 1.0.4
Can cause Safari Crashes?
Feedback Type: Troubleshooting Report
Contributed by: barney72 Thursday, February 24 2005 @ 08:56 AM PST
Product Platform: MacOSX
Used Product For: 1-6 months
System Info:10.3.8
G5 (June 2004), dual 2GHz, 1 GB RAM
Comments
Can't cause Safari Crashes! - deasys
"MEE will appear in every Cocoa app crash log"No kidding! Maybe there's a hint there, Rosyna...
Wednesday, March 22 2006 @ 12:41 PM PST
Can't cause Safari Crashes! - Rosyna
Then you're looking wrong.MEE doesn't do anything at all in any app but SUIS. So it cannot possibly be the cause of your Safari crash. It isn't running any code in Safari. MEE will appear in every Cocoa app crash log. Just like QuickTime or AppKit.
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Thursday, July 28 2005 @ 11:10 AM PDT