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tree image loading

I have a fairly small tree (40 - k60 items) with the default images (3 or 4 different images). It is still slow to load and it seems to request loading the same image over and over again for each node and line even tho the image has already been requested many times.

I notice this even with your documentation page - it takes a long time to load the images and seems to re-request the same images many times while populating the tree. How do i avoid this to speed up loading?

Thanks

If problem occurs in IE , you can try to add next line to init code of tree
           tree.enableIEImageFix(true)
It will change the way how images rendered in IE and must resolve image caching issue in most cases.