It may annoy you, but I have lived with what is similiar since I had a Hackintosh. I think it may be because I have 4 1TB drives and 1 1.5TB drive. I am able to see that it is looking for the bootloader (EFI) and has found it on GPT drive, then chameleon loads up. When I had an MBR type setup it would have a blank cursor and flash a second or two then load chameleon. I do not know how to make it go away, but in my opinion it is harmless, if everything is working.