Cracked 2007 Condor Pista

Yes, the cracking problem stems from the fact that Condor designed the frames with a straight-guage seat-tube, to save cost. As it's rather thin, mine has been reamed out to 30mm, and rather flexy, cracks develop where it meets the top-tube.

No it's not.

It's due to the fact that the seatpost inserts were cut too short and stop right at the join where the most stress is rather than a few inches below.