Hi ! I bought a few weeks ago a FT90-R, and I'm experiencing the same problem of squelch... One usually set it at around 10 o'clock, just over the "normal" QRN... after 2 or 3 minutes of QSO, (at full power), the squelch doesn't stays open until you turn the knob at 2 to 3 o'clock !!!
Apart from that, I have set about 40 QRG into the memory, but recently, one of them, a RELAY frequency, refuses to keep the split to enter the relay !!! Even when I set it again with the "minus 7.6 Mhz" split, it keeps it as long as the transceiver is turned on, but when I turn it off, the b... thing forgets again the split !!! ...and this problem occurs ONLY on ONE frequency !?!?! How come
Never mind, I like the FT90, because of it's size, but my next transceiver will surelly not be a Yeasu !!!
73's de F4JOC / Jean-Pierre