reply pointer
When replying to a message, especially if it's a longer thread of messages you start typing, but 10-20 secs later while typing the pointer goes on top of the message and half of my sentence goes before the beginning of it, that's really annoying!
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Kevin V commented
same thing is happening to me now, can't be anything in cache, malware blah blah blah, it's yahoo, Yahoo!. Fix the glitch. AND WHILE YOU'RE AT IT .... move the reply button, after you hit reply, your cursor winds up on the persons name and it pops up their contact info and you can't see the topic or body start. getting more annoying instead of being handier.