Pandas crashes trying to load Orange dataset (KDD 2009)
I've downloaded large dataset from http://www.sigkdd.org/kdd-cup-2009-customer-relationship-prediction. 

orange_large_train.data.chunk1.zip (52.7 Mbytes)
orange_large_train.data.chunk2.zip (52.7 Mbytes)
orange_large_train.data.chunk3.zip (52.6 Mbytes)
orange_large_train.data.chunk4.zip (52.5 Mbytes)
orange_large_train.data.chunk5.zip (52.6 Mbytes)

Pandas started to crash after I merged together chunks 1 to 4. Tested with pandas 0.15 on Windows and Linux. 
