0.7.2 Crashes on launch on OS X 10.9 Mavericks GM (Public release)

I understand that Mavericks is still in beta and that this might not affect 
sigil with the eventual GM version, however, I wanted to make you aware of this 
so you could prepare if there is something you will need to change within Sigil 
for the final version of Mavericks.

What steps will reproduce the problem?
1. Launch the app.

...

What is the expected output? What do you see instead?

I expect the app to launch. Instead it crashes. 

What version of the product are you using? On what operating system?

0.7.2 Crashes on launch on OS X 10.9 Mavericks GM (public release)

A copy/paste of the crash report:

http://pastebin.com/DMcngU57

Original issue reported on code.google.com by JoelHous...@gmail.com on 4 Oct 2013 at 3:52

oasegips / sigil

0.7.2 Crashes on launch on OS X 10.9 Mavericks GM (Public release) #2415