My recollection isn't that it was an application error, but rather, that it was some kind of goof where when using the one-by-one download from gc.com, the serial connection was dropping a character at the end. Again, I have only a vague recollection of the topic name where that came up.
To the OP: Assuming you really are only good for 6 characters, when you use GSAK, if you specify %drop2 in the "Waypoint name" field, it will drop out the unnecessary "GC" at the front of every GCxxxxx cache code and it will fit fine then. I even use this on my Dakota to save screen space for other info for the descriptive data.
Thanks - I discovered the %drop2 switch afer GSAK was recommended by the FTR (first to reply) - does exactly what I wanted. Just logged back to say thanks for telling about GSAK I'd not come across it before. And yes my etrex h really is only good for 6 characters and I don't think there is any 'fault' - just enjoying geocaching but sticking to budget. I appreciate eveyone bothering to contribute to this thread.