since half a year I'm a proud owner of the rd-800 and far from having discovered the big amount of possibilities this instrument delivers.
Within these 6 months, I have encountered weird issues with the behaviour of the transpose function/button twice:
1) During a session and while playing, the transpose button did activate without me pressing it, causing to take the note immediately pressed afterwards to calculate the transpose functionality. This choatic behaviour occured only that day and couldn't be reproduced ever since.
2) In the middle of some merry singalong session, when I used "transpose: +5" because of mismatching sheet material, the transpose would go up in octave steps until "+41", when I pressed the next few keys. Every try to set it back to "+5" resulted in the same behaviour: Set it to "+5" by holding the transpose key and press the corresponding "F" key, then play some notes (not necessarily that F, just anything) and watch the transpose go up to +17/+29/+41. Even a quick reboot didn't change that behaviour. When I tried to reproduce this some days later, everything worked fine as intended, no problems with transpose at all.
The weird thing is, that in both cases I could neither think of any (rather hidden) features nor me accidentally activating them. As a result, I really fear the unpredictability of the transpose button, since it can destroy a whole gig and finally make my rd-800 a really unreliable dp.
Perhaps, someone of you has experienced a same situation or is able to enlight my incapabilty with some helpful advice. Thanks in advance!