Mac mini, bluetooth connection problems

Hi, My mac mini (latest model) has recently got problems with the bluetooth connections to the keyboard and the mouse.
It seems to be some kind of interference to the wireless signal that makes the KB/Mouse to lose connection, and then
connect again.
I assume that it was one recent update that caused this as it worked without any problems for months before it
started by itself.
Any tips?

https://discussions.apple.com/message/20738621#20738621
2012 Mini Bluetooth/USB3 Interference: Apple Support Communities
http://blog.macsales.com/15990-shielding-resolves-usb-3-0-conflict-with-bluetoot h

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Of course, I use brand new batteries for both of them.
Message was edited by: Christophe Canus

***
My mini is doing it as well. Just started doing 2-3 weeks ago. Logitech Denovo or Apple Bluetooth. Doesn't matter which. Loses it in about an hour or so. Al Keyboards and mice were purchased at about the same time as the core 2 duo mini, ~ last October.
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