I too have had crashes with Iconoclasm moving icons out of folders. Turning off Iconoclasm restores this capability. The author has acknowledged problems reported by users of this nature with Iconoclasm 1.8.1 on iOS 6.1.
https://www.facebook.com/Iconoclasm.dylib
This happened to me as my Home page has a layout with only 4 icon positions (meant for folders; other blank space meant for LockInfo / NC / Widgets). When I try to drag an icon out of a folder to an already full page, the springboard crashes.
I've worked around the problem by adding additional icon positions (that I will never use). That way, if I drag an icon out of a folder, it just pops into an available blank spot. No more crashes.
I've Email'd the author that of what I suspect...that Iconoclasm crashes when trying to move an icon into an already full page.
I really like Iconoclasm. It allows me to position icons with a 1-pixel resolution. Also, Folder Enhancer now apparent supports it. Given the free "Iconoclasm Layout Maker" (by a different author; very nice program), it's make Iconoclasm much more enjoyable to use.