Comment 1 for bug 444474

Hi,

I can understand that you are facing problem while printing in grayscale, from your first statement it seems that the problem is with Acrobat reader as well as HPLIP. However in your second statement you mentioned that "This happens with all applications except Adobe Acrobat Reader.". Can you please clarify it once again.

I would also request you to try printing a text file and gray scale being selected, and let me know the result. Is it happening with all types of documents or only few.

In the meantime can you send me cups log by enabling the debug mode.
Please use the below link to enable the logging:
http://hplipopensource.com/node/225

Also send me the log for hp-check -t

Regards