Sorry if you don't like hearing negative feedback on the product, but I've worked on, tested and released many versions of complicated IDE/SDKs and other complicated products before and also have spent years listening to people's feedback on its strengths and weaknesses.
It doesn't matter if it doesn't work for "me". The product needs to be better.
I've seen numerous incidental reports here about people who can't get through a day of using Xcode without running out of RAM on a 16 GB Mac and without many crashes.
These are the EXACT issues that need to be reiterated about the product in addition to learning how to use it to provide solutions for its users.
If the group is not aware of its pitfalls and the pain it can cause its users, then people are only partly aware of what they need to be aware of or if they need to search for other tools to accomplish their goals.
While we use Xcode to make money, Xcode also costs us money when it does not work.
So, regarding the crash?
You have to remove any invisible .SVN repositories out of your project if you have removed your project's SVN Repository from the Organizer. If you don't and desire to rename any of the project filed through the Xcode GUI, Xcode is likely to crash on you.
Naturally, this shouldn't happen.