A new update was released last week for the Onyx Boox i86, M96C, T68, and other models. We don't have specific details on the update, but the page does note that this was the first updatein a little over two months and that "Several commonly reported problems solved".
I've checked over at MobileRead, and I couldn't find any first-hand reports on the changes and improvements, so you're going to have to into this one blind. And you're going to have to leave me behind; I've tried to install the update (twice) without success.
You can find the update over on eReader-Store.de. Please do let me know if it works for you.