I usually start the morning with the player on standby, and press Tuner to listen to Radio 4 on my way to work in the morning (having listened to music with Hijack's countdown timer indoors the previous evening). Radio 4 is preset 4, on 94.5 MHz, and I never switch to any other station (at least, not for several months).

Occasionally, when the player starts up, it shows on the display that it's preset 4 on 94.5 MHz, but the audio and the RDS indicate that it's actually receiving Radio 1, which I have on preset 1. If I go up or down 0.5MHz (or select a preset, or any action that changes tuning) it gets in sync with what it's displaying and all is well.

Any ideas?

I'm reasonably sure this one is on the internal bug list already.