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The "Pig070IncompatibleChanges" page has been changed by OlgaN.
http://wiki.apache.org/pig/Pig070IncompatibleChanges?action=diff&rev1=29&rev2=30

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  || Change || Section || Impact || Steps to address || Comments ||
  || Load/Store interface changes || Changes to the Load and Store Functions || 
High || [[LoadStoreMigrationGuide || Load Store Migration Guide]] || ||
- || Data compression becomes load/store function specific || Handling 
Compressed Data || Unknown but hopefully low || If compression is needed the 
underlying Input/Output format would need to support it || ||
+ || Data compression becomes load/store function specific || Handling 
Compressed Data || Unknown but hopefully low || If compression is needed, the 
underlying Input/Output format would need to support it || ||
  || Bzip compressed files in PigStorage format can no longer have .bz 
extension  || Handling Compressed Data || Low || 1. Rename existing .bz files 
to .bz2 files. 2. Update scripts to read/write files with bz2 extension || This 
change is due to the fact that Text{Input/Output}Format only supports bz2 
extension ||
  || Switching to Hadoop's local mode || Local Mode || Low || None || Main 
change is 10-20x performance slowdown. Also, local mode now uses the same UDF 
interfaces to execute UDFs as the MR mode. ||
  || Removing support for Load-Stream or Stream-Store optimization || Streaming 
|| Low to None || None || This feature was never documented so it is unlikely 
it was ever used ||

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