Hi Monsoon- YES! This is the one RAMPANT Vue 5 Infinite problem I've been having also. V5I's handling of Mats and ALSO VOB collections is VERY buggy. My best work-around has been to rename my larger collections with a "1-Vehicles", 1-Oceans", etc. This renaming and then telling Vue to FIND the new collections generally works- but not ALWAYS. Just giving them a new name is hit and miss. And sometimes they STILL disappear ANYWAY... So, YES, tell E-on tech support. I think I'll go over now and do the same thing. I bet you have big collections of stuff like I do- and it can be very irritating! Frankly- I wish V5I had a better browser- the pictures are often so TINY that you barely know what it is. Like my RDNA plants- I can find them WAY BETTER using Poser Pro Pack's thumbnails than using Vue's. In fact I think V5I's browser needs an OVERHAUL with bigger thumbnails, etc...