If you use POP email then you will want to avoid IOS 9 as it deletes your emails from the device.
Not just from your inbox but sent items, drafts etc too.
Not quite so bad if you have copies on other devices but those who don't are talking about taking out lawsuits against Apple for losing business emails and all sorts.
Apple have tried their hardest to keep the issue under wraps as it is obviously very serious.
IOS 8 was fine but the issue was introduced with IOS 9.
9.01, 9.02 and 9.1 didn't fix it.
It does appear however, that IOS 9.2 beta addresses the issue so fingers crossed the release of 9.2 sorts it.
Oh and PS I believe that the issue also affects IMAP although I can't confirm this as I don't use it myself.
Edited by VWGolfman (Thu 12-Nov-15 23:37:35)