I haven't experienced the other glitches but the one about leaving feedback I've been getting for the last couple of weeks on and off. I find if I wait a few hours it usually fixes itself or, if I can't be bothered waiting then a change of browser will fix it. I always use Firefox for anything eBay related but when this glitch occurs I change to Internet Explorer and the feedback function then seems to work fine.

Life's too short to waste time being frustrated by the various eBay glitches - I just accept them as a fact of life now...