I've the same problem. This is my log:
Process: amule [427]
Path: /Applications/aMule.app/Contents/MacOS/amule
Identifier: org.amule.aMule
Version: ??? (???)
Code Type: X86-64 (Native)
Parent Process: launchd [174]
Date/Time: 2009-09-18 14:47:04.491 +0200
OS Version: Mac OS X 10.6.1 (10B504)
Report Version: 6
Interval Since Last Report: 164918 sec
Crashes Since Last Report: 34
Per-App Crashes Since Last Report: 1
Anonymous UUID: 035BAEF9-E940-4342-BC0B-770CDDCDDAEA
Exception Type: EXC_BREAKPOINT (SIGTRAP)
Exception Codes: 0x0000000000000002, 0x0000000000000000
Crashed Thread: 0
Dyld Error Message:
Library not loaded: /opt/local/lib/libiconv.2.dylib
Referenced from: /Applications/aMule.app/Contents/MacOS/amule
Reason: Incompatible library version: amule requires version 8.0.0 or later, but libiconv.2.dylib provides version 7.0.0
Model: MacBook2,1, BootROM MB21.00A5.B07, 2 processors, Intel Core 2 Duo, 2 GHz, 3 GB, SMC 1.13f3
Graphics: Intel GMA 950, GMA 950, Built-In, spdisplays_integrated_vram
Memory Module: global_name
AirPort: spairport_wireless_card_type_airport_extreme (0x168C, 0x87), Atheros 5416: 2.0.19.4
Bluetooth: Version 2.2.1f7, 2 service, 0 devices, 1 incoming serial ports
Network Service: AirPort, AirPort, en1
Serial ATA Device: SAMSUNG HM250JI, 232.89 GB
Parallel ATA Device: MATSHITADVD-R UJ-857D
USB Device: USB to ATA/ATAPI Bridge, 0x152d (JMicron Technology Corp.), 0x2338, 0xfd100000
USB Device: Built-in iSight, 0x05ac (Apple Inc.), 0x8501, 0xfd400000
USB Device: Apple Internal Keyboard / Trackpad, 0x05ac (Apple Inc.), 0x021b, 0x1d200000
USB Device: IR Receiver, 0x05ac (Apple Inc.), 0x8240, 0x5d200000
USB Device: Bluetooth USB Host Controller, 0x05ac (Apple Inc.), 0x8205, 0x7d100000
I'm running Snow Leopard 10.6.1 on a macbook core2duo with kernel at 32bit but everything else at 64bit