Lyx-1.5 beta3 and letter class

[Deane Harder]

Dear all,

I use lyx 1.5 beta3 on Mac. When I opened a "New file from template" and 
chose letter (g-brief-de) and tried to PDF it, I got the following error 
message: LaTeX Error: Command \Telefon already defined. The same happens 
when I open existing lyx letter documents that I wrote with lyx 1.4. Any 
ideas?

Thanks

Deane Harder