Incremental Crashes WG++

Hi Guys
 
My set up runs almost perfectly on a brand new grab but if I then do an incremental grab (eg. the next day.) WebGrab just crashes with nothing much in the log.
I am running:
version 1.1.1/52.15 

uk-sky.com.ini -- Revision 4

tvguide.co.uk.ini -- Revision 4

aljazeerasport.tv.ini -- Revision 1

schedulesdirect.org.ini -- Revision 0

This is the output from my terminal, which gives more info.

I really hope you can have a quick look at this. I'll upload my log also.

Cheers

Rich

Terminal output:

<code>processing /volumes/hugedisk/tvguide/channels.xml ...

Unhandled Exception:

System.Collections.Generic.KeyNotFoundException: The given key was not present in the dictionary.

  at System.Collections.Generic.Dictionary`2[System.String,WebGrab.SiteIni].get_Item (System.String key) [0x00000] in <filename unknown>:0 

  at WebGrab.XmlSource..ctor (WebGrab.Config config, WebGrab.Utils utils) [0x00000] in <filename unknown>:0 

  at WebGrab.Program.Main (System.String[] args) [0x00000] in <filename unknown>:0 

[ERROR] FATAL UNHANDLED EXCEPTION: System.Collections.Generic.KeyNotFoundException: The given key was not present in the dictionary.

  at System.Collections.Generic.Dictionary`2[System.String,WebGrab.SiteIni].get_Item (System.String key) [0x00000] in <filename unknown>:0 

  at WebGrab.XmlSource..ctor (WebGrab.Config config, WebGrab.Utils utils) [0x00000] in <filename unknown>:0 

  at WebGrab.Program.Main (System.String[] args) [0x00000] in <filename unknown>:0</code>