Crashes immediately. I open, the icon bounces, then it closes and I receive this error message:

Process:         bitcoin [206]
Path:            /Applications/bitcoin-0.3.21/Bitcoin.app/Contents/MacOS/bitcoin
Identifier:      org.bitcoin.bitcoin
Version:         0.3.21 (321)
Code Type:       X86 (Native)
Parent Process:  launchd [82]

Date/Time:       2011-06-10 18:36:49.168 -0300
OS Version:      Mac OS X 10.5.6 (9G55)
Report Version:  6

Exception Type:  EXC_BREAKPOINT (SIGTRAP)
Exception Codes: 0x0000000000000002, 0x0000000000000000
Crashed Thread:  0

Dyld Error Message:
  Symbol not found: _fopen$UNIX2003
  Referenced from: /Applications/bitcoin-0.3.21/Bitcoin.app/Contents/MacOS/bitcoin
  Expected in: /usr/lib/libSystem.B.dylib

Here is my sysinfo

Model: MacBook1,1, BootROM MB11.0061.B03, 2 processors, Intel Core Duo, 1.83 GHz, 2 GB
Graphics: kHW_IntelGMA950Item, GMA 950, spdisplays_builtin, spdisplays_integrated_vram
Memory Module: BANK 0/DIMM0, 1 GB, DDR2 SDRAM, 667 MHz
Memory Module: BANK 1/DIMM1, 1 GB, DDR2 SDRAM, 667 MHz
AirPort: spairport_wireless_card_type_airport_extreme (0x168C, 0x86), 1.4.8.3
Bluetooth: Version 2.1.3f8, 2 service, 1 devices, 1 incoming serial ports
Network Service: AirPort, AirPort, en1
Serial ATA Device: Hitachi HTS542512K9SA00, 111.79 GB
Parallel ATA Device: MATSHITADVD-R   UJ-857
USB Device: Built-in iSight, (null) mA
USB Device: Apple Internal Keyboard / Trackpad, (null) mA
USB Device: IR Receiver, (null) mA
USB Device: Bluetooth USB Host Controller, (null) mA