Maybe I'll add nothing new but... I've just upgraded my x86 imac OSX leopard to version 10.5.2 and when launching phone it crashes immediately: I see in the monitor:
20/02/08 22:13:54 [0x0-0x36036].com.openwengo.WengoPhone[735] dyld: Library not loaded: /usr/local/lib/libgnutls.13.dylib
20/02/08 22:13:54 [0x0-0x36036].com.openwengo.WengoPhone[735] Referenced from: /Volumes/CollanosPhone/CollanosPhone.app/Contents/MacOS/CollanosPhone
20/02/08 22:13:54 [0x0-0x36036].com.openwengo.WengoPhone[735] Reason: image not found
20/02/08 22:13:54 com.apple.launchd[146] ([0x0-0x36036].com.openwengo.WengoPhone[735]) Exited abnormally: Trace/BPT trap
additional log info:
Process: CollanosPhone [339]
Path: /Volumes/CollanosPhone/CollanosPhone.app/Contents/MacOS/CollanosPhone
Identifier: com.openwengo.WengoPhone
Version:

(

)
Code Type: X86 (Native)
Parent Process: launchd [146]
Date/Time: 2008-02-20 22:07:04.317 +0100
OS Version: Mac OS X 10.5.2 (9C31)
Report Version: 6
Exception Type: EXC_BREAKPOINT (SIGTRAP)
Exception Codes: 0x0000000000000002, 0x0000000000000000
Crashed Thread: 0
Dyld Error Message:
Library not loaded: /usr/local/lib/libgnutls.13.dylib
Referenced from: /Volumes/CollanosPhone/CollanosPhone.app/Contents/MacOS/CollanosPhone
Reason: image not found
Regards to everyone there