Here's a bug I ran across yesterday:

int iMaxFP = 0;
for (POSITION pos = listFlowPeriods.GetHeadPosition(); pos != NULL; )
    iMaxFP  = max(iMaxFP , listFlowPeriods.GetNext(pos));

Note: listFlowPeriods is an MFC CList<int,int> populated with an arbitrary set of values. The purpose of this code is to determine the largest value in the list. Funnily enough, it actually does work some times! Cheers, Ralph