I've noticed it before, but I haven't been able to establish a true pattern of when and why. Sometimes the item is no longer available, sometimes it's just out of stock, sometimes it's because I closed my browsing session and/or cleared my history. So, what I did was make a wishlist that says "Final Selection" and that's where I add things when I get ready to place an order so nothing goes AWOL on me.

I haven't noticed anything like this either, but I honestly haven't been paying attention either. That wish list is a great idea, and I definitely do that from time to time too.

I noticed it a couple of times and just thought it was something with my computer. I cleared the history and performed scan disc, etc.

I notice this when I switch computers. My computer at home shows everything in my cart, but if I use my boyfriend's computer (which is also in the house) or at work, nothing shows in my cart.

Weird. I only use this computer, and I never log out.