MLG BUSTED CROSSING RESTRICTION AT KARYN INTERSECTION. PLT PHRASEOLOGY 'UNRESTRICTED CLIMB' NOT CAUGHT BY DEP CTLR.

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THE F/O WAS FLYING THE POMONA 1 DEP OUT OF ONT. THERE IS A 7000' ALT RESTRICTION AT KARYN INTXN; 2 NM FROM POMONO VOR. THERE WAS A VERY CAREFUL BRIEFING OF THE DEP AND 7000' WAS SET IN THE ALT ALERT WINDOW. WHEN WE WERE HANDED OFF TO DEP CTL FROM ONT TWR; THE DEP CTLR CLRED US TO 12000'. I READ BACK THAT WE WERE CLRED UNRESTRICTED TO CLB TO 12000' VERY SLOWLY AND CAREFULLY; SINCE THAT WAS VERY UNUSUAL FOR DEP CTL TO ISSUE THAT DELETION OF THE ALT RESTRICTION. THE READBACK WAS AS FOLLOWS: 'UNDERSTAND CLB UNRESTRICTED TO 12000?' THE CTLR REPLIED; 'ROGER.' AT ABOUT 7800' MSL THE CTLR QUESTIONED OUR ALT AND TOLD US TO DSND TO 7000'. THEN HE CHANGED HIS MIND AND TOLD US TO CONTINUE TO 12000'. AT THAT TIME I MADE SEVERAL COMMENTS ABOUT HIM JUST PREVIOUSLY CLRING US UNRESTRICTED TO 12000' AND THAT I HAD READ BACK THE CLRNC VERY SLOWLY AND CAREFULLY; EXPRESSING SURPRISE IN MY VOICE THAT HE HAD GIVEN US THAT CLRNC IN THE FIRST PLACE. THE I STATED THAT HE BETTER READ BACK THE TAPE IF HE HAD ANY QUESTIONS ABOUT MY CAREFUL AND SLOW READBACK OF HIS UNRESTRICTED CLRNC. I CAN'T THINK OF ANY POSSIBLE WAY OF PREVENTING A FUTURE OCCURRENCE EXCEPT TO IGNORE THE DELETION OF THE RESTRICTION AND FLY THE PUBLISHED ALT PROFILE INSTEAD. I COULDN'T POSSIBLY HAVE MADE THE FACT THAT THE RESTRICTION WAS MORE CLR W/O REPEATING MYSELF SEVERAL TIMES. THE ONLY OTHER POSSIBILITY IS FOR THEM NOT TO ISSUE A CLRNC ABOVE 7000' UNTIL PAST KARYN.