slave (at 1278301):
UPDATE speler SET gekwetst = 0 , kwetsure = 16 , liga_schorsing = liga_schorsing + 0 , cup_schorsing = cup_schorsing + 0 , tot_games = 96 , tot_goals_liga = 0 , tot_goals_cup = 0 , tot_geel_liga = 19 , tot_rood_liga = 0 , tot_geel_cup = 0 , tot_rood_cup = 0 , tot_bles = 3 , cur_games = 6 , cur_goals_liga = 0 , cur_goals_cup = 0 , cur_geel_liga = 4 , cur_rood_liga = 0 , cur_geel_cup = 0 , cur_rood_cup = 0 , cur_rood_fr = 0 , tot_rood_fr = 0 , cur_geel_fr = 0 , tot_geel_fr = 9 , cur_goals_fr = 0 , tot_goals_fr = 0 , cur_bles = 1 , moraal = 1000 , fitheid = 720 , ervaring = 263 , conditie = 818 , snelheid = 936 , balcontrole = 729 , skill1 = 533 , skill2 = 796 , skill3 = 691 , skill4 = 995 , spskill1 = 509 , spskill2 = 589 , form = '55-56-56-54-52' , best_rating = 558 , gslot = 4612 WHERE spelerID = '7650782'/*!*/;

master (at 1281122):
UPDATE speler SET gekwetst = 0 , kwetsure = 2 , liga_schorsing = liga_schorsing + 0 , cup_schorsing = cup_schorsing + 0 , tot_games = 92 , tot_goals_liga = 0 , tot_goals_cup = 0 , tot_geel_liga = 7 , tot_rood_liga = 0 , tot_geel_cup = 0 , tot_rood_cup = 0 , tot_bles = 1 , cur_games = 7 , cur_goals_liga = 0 , cur_goals_cup = 0 , cur_geel_liga = 0 , cur_rood_liga = 0 , cur_geel_cup = 0 , cur_rood_cup = 0 , cur_rood_fr = 0 , tot_rood_fr = 0 , cur_geel_fr = 0 , tot_geel_fr = 8 , cur_goals_fr = 0 , tot_goals_fr = 0 , cur_bles = 0 , moraal = 1000 , fitheid = 628 , ervaring = 303 , conditie = 770 , snelheid = 601 , balcontrole = 917 , skill1 = 938 , skill2 = 609 , skill3 = 721 , skill4 = 794 , spskill1 = 555 , spskill2 = 686 , form = '58-56-59-56-54' , best_rating = 594 , gslot = 4612 WHERE spelerID = '7650786'/*!*/;

slave (at 1281262 => ERROR ):
UPDATE speler SET gekwetst = 0 , kwetsure = 2 , liga_schorsing = liga_schorsing + 0 , cup_schorsing = cup_schorsing + 0 , tot_games = 92 , tot_goals_liga = 0 , tot_goals_cup = 0 , tot_geel_liga = 7 , tot_rood_liga = 0 , tot_geel_cup = 0 , tot_rood_cup = 0 , tot_bles = 1 , cur_games = 7 , cur_goals_liga = 0 , cur_goals_cup = 0 , cur_geel_liga = 0 , cur_rood_liga = 0 , cur_geel_cup = 0 , cur_rood_cup = 0 , cur_rood_fr = 0 , tot_rood_fr = 0 , cur_geel_fr = 0 , tot_geel_fr = 8 , cur_goals_fr = 0 , tot_goals_fr = 0 , cur_bles = 0 , moraal = 1000 , fitheid = 628 , ervaring = 303 , conditie = 770 , snelheid = 601 , balcontrole = 917 , skill1 = 938 , skill2 = 609 = 691 , skill4 = 995 , spskill1 = 509 , spskill2 = 589 , form = '55-56-56-54-52' , best_rating = 558 , gslot = 4612 WHERE spelerID = '7650782'KjxF/*!*/;

conclusion:
first 664 characters in slave query are identical to the master query,
but then things go wrong, the part of the slave query after character 664
seems to be the part of a previous slave query at 1278301 after character 676.

So what probably happened, is that the new slave query was not taken over
completely, causing the new slave query to be corrupted garbage...