Since Yosemite i have a bug on mail and it follows me to os x 10.11 (all public betas). When in a mail are attachments i cant open it with double click. I need at least 4 clicks in every attached file. When i try to save them all from the icon on mail attachments, it just save the first of all files...and only this one. If i do save attachments from menu bar it works fine. I rebuild mail and i repair mail (delete index files...in Library and so on), but still not resolved. I don't know if anyone have the same experience.