ESP SP11 Memory Leak Issue

We have upgraded ESP from SP 5 to SP 11 and noticed that the memory usage is increasing quite a bit over time (~100 MB per hour). We did our due diligence to follow all the best practice of using dictionary and also using retention policy for each of the windows withing the project.

The ESP project uses around 10 ODBC connections to get data and uses Flex to process it. We do not see this continuous memory usage increase with SP 5.

Is there any know memory leak issue with SP 11?

We are using ESP in Linux 2.6.32-573.18.1.el6.x86_64 package.