Very handy, and not as scary as I first thought. I’ll add that to fix the error I had to replace the svn-base file and the file itself. E.g: say I have this directory:

+-trunk/
 |
 |-file.java
 |
+-.svn/
    |
    +-text-base/
     |
     |-file.java.svn-base

I had to copy both file.java.svn-base and file.java in order to resolve the checksum mismatch.