ITBLL fails for me if generator does anything but 5M per maptask

Anyone else seeing this? If I do an ITBLL with generator doing 5M rows per maptask, all is good – verify passes. I've been running 5 servers and had one splot per server. So below works:

HADOOP_CLASSPATH="/home/stack/conf_hbase:`/home/stack/hbase/bin/hbase classpath`" ./hadoop/bin/hadoop --config ~/conf_hadoop org.apache.hadoop.hbase.test.IntegrationTestBigLinkedList --monkey serverKilling Generator 5 5000000 g1.tmp

or if I double the map tasks, it works:

HADOOP_CLASSPATH="/home/stack/conf_hbase:`/home/stack/hbase/bin/hbase classpath`" ./hadoop/bin/hadoop --config ~/conf_hadoop org.apache.hadoop.hbase.test.IntegrationTestBigLinkedList --monkey serverKilling Generator 10 5000000 g2.tmp

...but if I change the 5M to 50M or 25M, Verify fails.

Looking into it.