I have the latest stable version of KeePass 2.23 running on Windows 7 Pro 64-bit English. All my region format, location and keyboard are set to Czech Republic/Czech language, Czech QWERTZ keyboard.
I experience small inconvenience when entering "@" character in Notes section of any entry. Because I'm using Czech keyboard, the usual way of entering "@" character is to press AltGr+V or Ctrl+Alt+V.
Such key combinations however also trigger "paste" action so I end up with "<CLIPBOARD_CONTENT>@".
Such key combos work fine with other fields.