iChat not opening

[chucknorris36]

My iChat refuses to open. Every time I click on it to open it it will not open at all and a window will come up saying "The application iChat quit unexpectedly". How can i get my iChat to open and is someone or something hacking into my computer?

 

[Giaguara]

What version of Mac OS X?
What version of iChat?
Does it happen with one user or all? Did it work before?

Go to ~ (your home folder)/Library/Preferences and inside tehre, delete com.apple.ichat.plist while iChat is not running. Restart the application. Any difference?