Can anybody tell me if memory upgrades have to be the expensive Sony memory or can you use third party memory such as crucial with the following spec and not invalidate my warranty?
Yep. Just means you can't sell the old ones on eBay because you need to put them back in if it gets sent off. It's basically a scam to get you to be ripped off buying Sony RAM, there's nothing unsafe about Crucial or other major brands whatsoever.
