Yes, I've tried that and every other standard diagnostic I can think of, and just saw other similar threads posted by others sellers trying to do listings over the last few days.  This is apparently an actual glitch others are experiencing as well.  Just hope eBay can fix it as it is taking me about 7 times longer than usual to get any listing up.  The page just keeps rebooting itself and not saving input.  And it doesn't work to keep saving it as a draft in hopes of retaining the input.