Problems, problems...

I have been using the excellent program The Many Faces of Go to practice go problems. I try to do problems every day. Today, I decided that I was going to add some of my own problems (out of Davies 'Life and Death' book). It took me a few minutes to figure out the problem editor, but then things seemed to go just fine. Until I tried to save the second problem 'Can't save problem files' Now what? Saving the first time goes just fine, but once the file exists, it doesn't want to change it anymore. Spent way too much time trying to solve this, I could have been playing go instead!