This winodw has a parent window

Whenever I try to print using the print sheet from a particular window, I get a log message that says "This winodw has a parent window <NSPanel : 0x9cc300>". I cannot make any sense out of this. What is this about? Does it mean anything? Is there something I may be doing wrong? BTW, the misspelling is not mine, this is exactly what the log says.

thanks,
Christiaan