Smuxi

Got this on smuxi-frontend-gnome startup. Smuxi client won't start after it.

Exception Type:
System.ArgumentExceptionException
Message:
does not implement right interface
Exception StackTrace:  at System.Collections.Generic.Comparer`1 DefaultComparer[Smuxi.Engine.PersonModel].Compare (Smuxi.Engine.PersonModel x, Smuxi.Engine.PersonModel y) [0x00000] in <filename unknown>:0   at System.Linq.SortSequenceContext`2[Smuxi.Engine.PersonModel,Smuxi.Engine.PersonModel].Compare (Int32 first_index, Int32 second_index) [0x00000] in <filename unknown>:0   at System.Linq.QuickSort`1[Smuxi.Engine.PersonModel].CompareItems (Int32 first_index, Int32 second_index) [0x00000] in <filename unknown>:0   at System.Linq.QuickSort`1[Smuxi.Engine.PersonModel].MedianOfThree (Int32 left, Int32 right) [0x00000] in <filename unknown>:0   at System.Linq.QuickSort`1[Smuxi.Engine.PersonModel].Sort (Int32 left, Int32 right) [0x00000] in <filename unknown>:0   at System.Linq.QuickSort`1[Smuxi.Engine.PersonModel].PerformSort () [0x00000] in <filename unknown>:0   at System.Linq.QuickSort`1 <Sort>c__Iterator21[Smuxi.Engine.PersonModel].MoveNext () [0x00000] in <filename unknown>:0   at Smuxi.Frontend.Gnome.GroupChatView.Populate () [0x000fd] in /build/buildd/smuxi-0.8.12 git/src/Frontend-GNOME/Views/Chats/GroupChatView.cs:306   at Smuxi.Frontend.Gnome.ChatViewManager <OnChatSynced>c__AnonStorey20.<>m__33 () [0x00071] in /build/buildd/smuxi-0.8.12 git/src/Frontend-GNOME/ChatViewManager.cs:326   at GLib.Idle IdleProxy.Handler () [0x00000] in <filename unknown>:0