This is not a bug. Re-compressing a lossy file always results in generation loss, especially recompressing a low quality file with poor quality would result in horrible quality. See http://en.wikipedia.org/wiki/Generation_loss#Techniques_that_cause_generation_loss_in_digital_systems
This is not a bug. Re-compressing a lossy file always results in generation loss, especially recompressing a low quality file with poor quality would result in horrible quality. See http:// en.wikipedia. org/wiki/ Generation_ loss#Techniques _that_cause_ generation_ loss_in_ digital_ systems