I've had this problem every day for years. The site will be unavailable for, say, twenty minutes at a time. When I do get on, I'll try to post something and get knocked off again. I usually use IE, but the same thing happens with Chrome, and with my desk top, laptop, tablet, and iPhone. Whenever I type a message I copy it before submitting because it so often disappears and might take nine or ten tries to work. I thought it might be a US thing because no one else seemed to be having this trouble.