I have been trying to buy Tablet computers and accessories from Alibaba.com over the last few days without success. My purchases get approved by VISA. I get email confirmation of successful payment from Alibaba.com and then a day or two later get an email notification from Alibaba.com that my Tablet order has been "Closed" for security reasons. This has happened three times so far in less than a week. Very frustrating. Has anyone else had this experience as well?