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Memory Leaks while closing dhtmlxwindows

I am currently using the 2.1 free version of the dhtmlxWindows component. I have encountered fairly significant issues with memory leak when attaching URL to multiple dhtmlxwindows within a single viewport.

More specifically, I'm testing that on the following modified sample file: attach_url.html. I've modified the "Attach URL" button in order to create a new dhtmlxwindow each time I click on it. Basically each time a new window is created, memory is allocated and memory usage for IE 6.0 increases. The more complex the URL html code is, the more memory the library allocates. That's definitely normal ...

Nevertheless, when those windows are closed, IE doesn't de-allocate the previously allocated memory. The memory usage for the browser application remains constant... Unless you minimize it (?!!)...

Is there any way of flushing more efficiently the windows objects to decrease the memory usage? Or, do you know if there's somewhere a security patch which fixes this issue to install for IE 6?

Thanks for your help.

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