1.) Every download... each and every download... starts in a default folder (My Documents/Downloads). When you navigate to a new folder to save something (like a picture or .PDF file), each time you have to re-navigate. It's annoying, but workable.
2.) Yahoo! mail stopped letting me reply to messages that were originally send in HTML format. I could hit reply, but not actually enter any text, even if I changed it to plain text. Since I'm still jobsurfing, this was a major FUBAR, and fatal.
It's also a new event in the last few days. I don't know what caused it, but I'm not going to spend time to figure it out.
I have now migrated to Firefox. I'll try that for a while.