A300 FLC; ATTEMPTING TO REDUCE AIRSPD AND BEGIN DSCNT ON THE MADWIN ARR INTO OAK; ARE INITIALLY ABOVE 250 KTS BELOW 10000 FT BEFORE RECOGNIZING THEIR ERROR.

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WHILE DSNDING ON THE MADWIN 4 ARR TO OAKLAND; CA; WE CROSSED SHARR INTXN AT 10000 FT AND 280 KTS (A NOT TO EXCEED SPD ASSIGNED BY ATC). WE QUERIED THE CTLR ABOUT XING CATTY INTXN AT 8000 FT; AS WE WERE APCHING CATTY AND WOULD NOT BE ABLE TO MAKE THE 8000 FT XING IF WE DIDN'T START DOWN SOON. THE CTLR THEN GAVE US THE 8000 FT XING RESTR AT CATTY. I IMMEDIATELY START OUT OF 10000 FT TO MAKE THE RESTR; BUT I WAS STILL AT 280 KTS. THE CTLR ASKED US ABOUT OUR AIRSPD; AND WE RESPONDED '280 KTS.' THIS OCCURRED WHEN WE WERE AT 9750 FT; AND I IMMEDIATELY SLOWED TO 240 KTS WITH SPD BRAKES. HE POINTED OUT TFC AHEAD FOR US TO FOLLOW; AND SAID THAT WE WERE 80 KTS FASTER. I SLOWED ANOTHER 80 KTS TO FOLLOW TFC. THERE WAS NO FURTHER COMMENT FROM THE CTLR ABOUT OUR AIRSPD; SO I DON'T THINK THERE WAS ANY SPACING PROB AS THIS ACFT WAS 5 MI AHEAD OF US; BUT WE WERE ABOVE 250 KTS SLIGHTLY BELOW 10000 FT BEFORE I BEGAN TO SLOW. I THINK THE PROB LIES WITH BOTH THE CTLR AND OURSELVES. THE CTLR WAS LATE GIVING US THE XING RESTR -- CAUSING US TO RUSH. I THINK OUR INATTN ON THE AIRSPD WAS CAUSED BY FATIGUE; AS THIS WAS THE LAST DAY OF AN 8 DAY TRIP; AND WE HAD FLOWN 29 HARD HRS OF FLYING WITH 5 TRANSCONTINENTAL XINGS AND 2 LEGS ON THIS LAST DAY.