Orderby: uppercase Z > lowercase a

[eluser]PeterGreffen[/eluser]
Hello,

An "ORDER BY" like ($this->db->orderby('name'));
gives me this result:

1. Adam
2. Zora
3. anna
4. zanzibar
5. ...

Seems like the uppercases are higher ranked than the lowercases...
Does anyone know how to solve this?

Thank you!
P.