Actually, the bug was in the 586 (Pentium)'s floating point division. Unless you're talking about something much older, in which case I've never heard of it. Either way, Intel CPUs didn't have FPUs until the 486DX, which came much after the 8086.

Hardly anyone understands this bug anyway, they all just like to laugh like idiots at equations like "1+1=1.999999486". Most of them are Mac users. Go figure.