My gosh, it's been two whole days without any additions to the thread... are we approaching stability?!
Not so fast...
I was all set to come in and say mine is continuing to work perfectly, because up to now I've not had a problem with any of the firmwares, and my MT has been 100% reliable... but I got bitten a couple of days ago.
There seems to be a small loss of functionality with 1.4.0 which if you're not careful will cause you to lose data. Previously, to start a new file on the fly, you could just hit the Rec button twice quickly, and it would write the current file and instantly start the new one. Well now if you do that... it writes the first file alright, and gives the appearance of starting a new one, but the file number doesn't advance, and in the time remaining box it shows the length of the file you just recorded instead of time remaining on the card or file. Meanwhile it still looks like it's recording - it still receives signal (I checked later with monitoring), and the timer counts away.
But when you press Rec again to write the second file, it just stops with no writing file message. Check the files and it's not there either. But - the file number was assigned - start another file, and a gap appears in the file numbering sequence.
So after all that, I found that now, you must
*not* start the new file until the current one has finished writing and the MT has returned to a 'stopped' state.
I created a missing file on another card to see if anything was actually recorded and is recoverable with scandisk or something, but no luck yet...