...and yet how strange that both share a similar style of username and have been posting these competition questions for the past year or so in alternating blocks:
c45 - May thru' June '09
S30 - July thru' Sep '09
c45 - 1st half of Oct '09
S30 - 2nd half of Oct '09
c45 - Jan thru' beginning Feb '10
S30 - mid-Feb '10
c45 - end-Feb thru' mid-Mar '10
S30 - mid-Mar '10
c45 - end-Mar '10 to July '10(present)
S30 - July '10
and prior to this month had duplicated only 1 question (mid-March '10).