Some people have discovered you can replace a damaged image/changes file in the Squeak.app before you install the application. 
To do this replace the iPhone.image iPhone.changes with the official image/changes file. located at: ????

This image has the following changes as linked to below to enable complex events and to interface to Objective-C

~-[[ChangeSets Change Sets for Squeak]]

Beware because Apple signs all files in the application, it maybe that this method of altering/replacing "damaged files" may not work at some point in the future for obvious reasons... 

***  Oops, yes in the current development environment you can't alter the images file, you get unable to verify application signature ****