OS X V10.7 Lion :: Search Not Working Properly In Mail?

The search feature in Lion/Mail will not find names or words in the "Subject" category even when I know they exists.  I use mail for my business and often need to find old emails from clients..... the new search feature in Lion does not work.  How can Apple release a product with such a obvious flaw?    

Other problems with mail..... • When I open mail no new mail will appear in my "in box" until I select another mail box like "trash" or "Sent".... then the new mail will appear. • The "Hide Mail" feature is greyed out when mail is open.... there's no way to hide mail. • The scroll down bar on the right side of the window is hidden until you drag the edge of the frame over to reveal it. • Windows are locked and can't be moved. I've been using Apple products from the earliest days in the 1980's and quite frankly have been shocked at some of the things Apple is screwing up these days.  From the Final Cut Pro conversion to Final Cut X disaster that has sent thousands of professional editors running to other products, to these seemingly small but irritating flaws with the new software being released before these problems have been addressed. A search feature that does not work?