When the jailbreak came out for the iPhone 4 I was very excited. I was even more excited when a lot of my favorite jailbreak apps became available. Then I noticed Gowalla, an App Store app for check in to locations, had stopped working. When you opened the app it would just crash right away.
I tried uninstalling and reinstalling but it just kept doing it. Eventually I found out it was a problem with having my iPhone jailbroken and specifically having Winterboard installed.
Here’s a recent @reply from @gowalla: