BladeWolf, we might have a different understanding of what a memory leak is. To make sure we're on the same page - I go by this definition: http://en.wikipedia.org/wiki/Memory_leak

Again, I'm not aware of the problem you are experiencing. If you want us to do something about it, we need a very detailed description (what render engine, what app preferences) and a scene that reproduces the problem. If the problem occurs with any scene, it might make sense to go over your system settings with tech support (virtual memory, user rights, etc.).