I bought a new Nikon D90 and the Lexar Pro 8GB SDHC card to go with it. The card worked great for 2 months until the plastic broke up around the contacts. I contacted Lexar tech support and, after a few e-mails and some photos of the damage, they agreed to replace it. I shipped in the broken card and received the replacement within a week or two.
The replacement, however, didn't work in my camera. After a few conversations with Nikon and Lexar, I learned the 8GB card is not listed on the Nikon compatibility list for my camera. The 4GB was listed but, not the 8GB. Lexar offered some formatting suggestions to try to get the card to work with my camera. Unfortunately nothing worked.
Oh well. I can use the Lexar card in my Fuji Finepix camera and I'll go out and buy a new card off the Nikon D90 compatibility list.
By the way, the only difference I can tell between the first broken 8GB card and the second 8GB replacement card is that the first was made in China and the second in Taiwan. The second card seems noticeably more rigid and sturdy. Unfortunately, you can't tell the which location the card was built in until you open the package and look at the back of the card.