A320 FLT CREW REPORTS AIRFRAME VIBRATION THAT DISAPPEARS WITH RIGHT RUDDER INPUT.

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INBOUND CAPT TURNED OVER SLIGHT VIBE IN ACFT DURING CLB; NOT TOO BAD. WE WERE LATE DUE TO LATE INBOUND DEPARTING MCO TRYING TO MAKE UP TIME; AT 12000 FT AT 330 KIAS WE GOT VIBE. I HAD PRE-BRIEFED FLT ATTENDANT REGARDING INBOUND PLTS TO STAY SEATED FOR POSSIBLE VIBE. WE CHKED WITH FLT ATTENDANT WHEN WE GOT VIBE; THEY NOTICED IT; AND WE TROUBLESHOT. VIBE WENT AWAY WITH R RUDDER INPUT EVERY TIME REGARDLESS OF ALT OR SPD. WE COMPLETED LOG WRITE-UP; COMPLETED VIBE SHEET. FLT ATTENDANT RPTED PAX NOTICED ABNORMAL OPS AND QUERIED. WE TOLD THEM WE KNEW ABOUT 'SHIMMY' AND WOULD ADDRESS IT IN ZZZ. I MADE CALLS TO MAINT TO REMOVE ACFT FROM PAX SVC. I CALLED OUTBOUND CAPT TO RELAY MY CONCERNS; ACFT WAS RELEASED. I AM SURE MAINT DID EVERYTHING REQUIRED OF THE MAINT TIPS; BUT I WOULDN'T FLY IT REGARDLESS. NO WAY THIS ACFT SHOULD HAVE BEEN SENT INTO PAX SVC WITH THE CURRENT PROB. MAYBE MAINT LIMITS NEED TO BE REEXAMINED; BUT I'LL BET THIS ACFT COMES BACK WITH THE SAME HIT SOON; ESPECIALLY WHEN THE PLTS ARE PAY PROTECTED AND DON'T WORRY ABOUT LEAVING AN UNWORTHY ACFT ON THE GND. DISPATCH MADE INQUIRIES; BUT THE BOTTOM-LINE IS THIS ACFT WENT FLYING WITH A KNOWN FLT CTL PROB; STAUNCHLY RPTED BY PRECEDING FLT CREW. MAKES ME RECONSIDER SENDING MY FAMILY ON THE MARGINAL MAINT OF THIS ACR; PARTICULARLY THE A320. PLEASE RESPOND TO MAINT TOLERANCE ON THE KNOWN ANOMALY.