Using 6.0.452.2 it doesn't seem to be possible to have any default text when adding a String < 255 or Long String > 255 property to a page type.
If I select either property and then include any default text then I always get the message;
"test" is not a valid value for "String (<= 255)".
This doesn't happen with XHTML String properties however.
Is this just a bug with RC1 or has the process for adding default text changed on string properties?
This is a bug in RC1. It has been fixed and will be included in the release version.
Per GunsarfsEPiServer Development Team
That's great, I look forward to trying the next release then,