KnockoutJS IE8 performance issues and memory leaks

We build complex enterprise application using KnockoutJS and faced poor performance especially in IE8. Application might take more than 1GB of RAM and never frees memory. During investigation we discovered that KnockoutJS keeps references to the DOM nodes and never deletes it. This can be reproduced using IESieve against any public KnockoutJS example, just watch DOM utilization while playing with example which adds and deletes DOM nodes.

Have anyone faced this problem and has any ideas of how to work this out?