the ambiguous place holders B (aspartic acid or asparagine) and Z (glutamic acid or glutamine) do not lead to an illegal character error any more and are correctly processed now.
in case of illegal characters in the submitted sequences the error message includes now these characters and their exact position.
GRAVY-dependent coloring is overloading many browsers if many sequences are submitted. Thus, this option is deactivated until further notice. Please let me know if you need it.