As in the title, if I try to open and old file with old proxy inside, 3ds max freeze and RAM raises quickly the maximum amount of RAM.
Also if I try to merge it (but not with every old proxy). If I create a new empty Corona proxy and load from disk the .cbin file, everything is ok!
In attachment the files.
With A4 and A5 ( 2013-05-30) no problem.
As Ondra suggest me, there is some bug in the asset tracking.