iChat 3.1 quitting on start-up on osx 10.4.3

[jmiles1]

Suddenly started quitting on startup with no error message. All been working fine. Searches reveal others have had this issue but no clear answers.
Tried re-installing from Tiger CD and also re-installing 10.4.3 update.
Saw someone asked for a log from terminal. Here is what I got when i did this.
Your help appreciated.
Thanks,
John

johnmiles-iMac:~ Rosie$ /Applications/iChat.app/Contents/MacOS/iChat -errorLogLevel 7
213924.142622 Loading hardware rules from hardwarerulesH264-G4.plist
213924.143536 Checking H264 hardware rules
213924.144131 Satisfied rule #5 (20:160x120)
213924.145120 setLocalUserName: Rosie Miles@192.168.0.3
213924.180114 ### NEW STATE: to: VC_INIT, from: VC_INVALID
213924.182502 ### NEW STATE: to: VC_IDLE, from: VC_INIT
213924.183170 ++++++++++ confStatusMapRemoveAll
213924.183663 ( ) -- mapUserIDToSecurityInfo cleared --
213924.184755 UPnP init passed
213924.185575 NATTraversal created
213924.186370 QT automatic setting = 1
213924.186948 Bandwidth based on QT prefs = 0
213924.210102 BWD: No existing BWD cache
213924.210815 BWD: Launching thread to determine focus capability based on bandwidth.
213924.213971 QT automatic setting = 1
213924.214671 BWD: Using QuickTime value: 0
213924.215182 BWD bandwidth: 0 kbits up, 0 kbits down.
213924.215624 videoNetworkCapable: 0 -- 0 max participants.
213924.216036 audioNetworkCapable: 0 -- 0 max participants.
213924.216634 vcCapabilities returns: 0x00000007
213924.217202 VCCapAudio
213924.217640 VCCapVideo
213924.218047 VCCapMultiAudio
213924.247542 UPnP Router Info:
- manufacturer [Netgear]
- friendly name [Netgear DG834PN Router]
- model name [ADSL Firewall Router]
- model desc [Netgear DG834PN Router]
213924.250178 UPnP: Begin TCPProc
Broken pipe
johnmiles-iMac:~ Rosie$