iPhone Fix - This worked for me

I did the following to fix my third-party applications crashing problem.

• Uninstall all my third-party applications via the iPhone
• Delete all my third-party applications form iTunes. I think this is the key step.
  
• Do a restore of the iPhone. I'm not sure if this is necessary. But, I did it.
• Installed a third-party applications from iTunes, not via the iPhone. This worked! Yay!
• Tried to install from the iPhone. This now works. Yay!