You can make the warning revive:
ToolsOptionsCalculation tab, uncheck Iteration

--
Kind regards,

Niek Otten
Microsoft MVP - Excel

"GoBobbyGo" wrote in message ...
|I suspect that my worksheet has a circular reference because every time I
| recalculate it, the value of certain cells changes.
|
| Complicating this is the fact that excel seems not to be warning me about
| circular references at all now. I can put =A2 in cell A1 and =A1 in cell A2,
| and the customary warning about circular references doesn't pop up at all.
|
| Any suggestions?