> And so, because I don’t want to hold Fn every time I want to press an F-key for its intended purpose, I used the arcane shortcut Fn+Caps to “lock” the keyboard into “standard” mode, where multipurpose F-keys remain multipurpose F-keys unless I hold down the special magic button that transforms them into rarely-used single-purpose special function keys.

> But here’s where the problem occurs. If the batteries get changed, or if the keyboard gets turned-off for an extended period, or sometimes – seemingly – just randomly… that function-lock gets switched off.

I have this problem with my Microsoft Natural keyboard; my favourite ever Microsoft product which helps me keep my RSI at bay.

Every now and again the Fn lock key gets pressed by accident. I then look very confused for some time as to why none of the Fn keys are working before I remember the dratted Fn lock key.

The Fn lock key is next to F12 so well in the range of accidental presses.

Maybe not many people drive their setup with function keys any more, I don't know.