RequestAssociation with invalid mime returns true.

I am requesting Invalid MIME (Mime syntax is [any char]+/[any char]+). RequestAssociation is returning true.

I think it should return false here. I understand we are not checking the syntax of mime type.(and expecting user will know this ) But I think it should be nice to check these to make the api more robust.
Example:
                IntegrationService is = (IntegrationService)
                        ServiceManager.lookup("javax.jnlp.IntegrationService");
                String mime = "abc";
                String [] exts = {".abc"};
                boolean result = is.requestAssociation(mime,exts);