I haven't been able to use Live View on my D300 for some time. Not a big deal as I'd rarely if ever use it anyway, but annoying.
Today exploring a bit, I find it works perfectly in Tripod mode, with all my old manual focus lenses, including a Tamron 24 F2.5 on an Adaptall2 mount. But it doesn't work at all on any AF lens.
It works erratically on my Micro Nikkor 105 F2.8 which is an AF lens which is broken and won't autofocus.
In Handheld mode it works erratically with MF lenses only.
Am I missing something here?