The call stack window doesn't show blue lines for the top calls. For example:
#0 fpc_raiseexception at :0
#1 DB_DATABASEERRORFMT$ANSISTRING$array_of_const$TCOMPONENT at :0
#2 DB_TDATASET_$__FIELDBYNAME$ANSISTRING$$TFIELD at :0
#3 TFMMAIN__BUTTON1CLICK(0x380f2e8, 0x380ee78) at main.pas:98
#4 TCONTROL__CLICK(0x380f2e8) at control.inc:2227
#5 TBUTTONCONTROL__CLICK(0x380f2e8) at buttoncontrol.inc:72
#6 TCUSTOMBUTTON__CLICK(0x380f2e8) at buttons.inc:164
#7 TBUTTON__CLICK(0x380f2e8) at buttons.inc:331
#8 TBUTTONCONTROL__WMDEFAULTCLICKED({MSG = 66567, WPARAM = 5092304, LPARAM = -591746099, RESULT = 0, WPARAMLO = 46032, WPARAMHI = 77, LPARAMLO = 43981, LPARAMHI = 56506, RESULTLO = 0, RESULTHI = 0}, 0x380f2e8) at buttoncontrol.inc:26
#9 SYSTEM_TOBJECT_$__DISPATCH$formal at :0
#10 TBUTTONCONTROL__ISCHECKEDSTORED(0x31ef750) at buttoncontrol.inc:22
Index 0 has a green arrow, index 1 and 2 have grey dots. Blue dots in index 3 to 8, grey dot at index 9, etc