UI.openpanel no title in OS X

[rami_lpm]

Hi everyone.
I'm having trouble with UI.openpanel. It doesn't show the title when running in OS X, no problems in Win 10.
Also, UI.savepanel does show the title. Is this a bug or am I doing something wrong?

I tested it with this oneliner.
UI.openpanel("can you read this?", "~/","yes")

Thanks

Edit:
UI.savepanel does show the title.
According to Driven "the UI.savepanel and UI.openpanel use different nib files, so the behaviour is 'by design'..."