When adding many items to ar overlay, moving phone around couses Out of memory exception. I was able to pinpoint source code that couse this behaviour:
// Set the transform, which moves the item
wvItem.RenderTransform = ct;
In file WorldView.cs line 268. Memory profiler for windows phone shows that 100 MB+ for texture memory, so im guesing that changing transform for item fires rebuilding of list view item textures and old are not released.
ArItem content is just string, no data template attached to arview.
Any ideas ? Someone else can reproduce this behaviour ?