Has anyone else noticed bluetooth keyboards not wanting to connect after the update to week 51 firmware?

I've tried reediting the main.conf file but nothing happens.

Actually, looking at the post previous to mine this may have been the week 46 firmware update that did this.

Also does anyone know which file governs whether the connect/disconnect button in the bluetooth settings is enabled? I notice that it is enabled for my computer and my Nokia bluetooth headset but disabled for my BT printer, bt keyboard, wife's phone and garmin gps mouse.