Explosions cannot be done twice on the same edge

[GoogleCodeExporter]

What steps will reproduce the problem?
1. Blow up a mesh
2. Try blowing up the same mesh again
3. Fail miserably
4. Commit suicide (note: actually committing suicide not recommended)

What is the expected output? What do you see instead?
A mesh should be able to blow up as much as it likes. However it does not. 

Please use labels and text to provide additional information.

Original issue reported on code.google.com by [email protected] on 13 Dec 2012 at 11:49