Yes, I can reproduce the problem in: cutesoft.net/example/database-example.aspx
I have made 2 tests at the test address you supplied...... Also sometimes æ,ø,å becomes NULL when the text is loaded in CuteEditor.
I've tried to download you latest build and deploy that one... After that it seems that the NULL issue has been fixed, but I'm still not able to see æ,ø,å in the editor when text is loaded from the database!