Well, if you know me well enough you know i wouldn't leave it alone. So i tried s1clone, but when trying to re-flash it said the firmware, size of the chip and blocksize didin't match, although it was obtained from the same device. So i immediately stopped the operation. I discussed this in another topic.
Now for the funny stuff. I changed my playlist a little, so i copied all the files off my MP4, formatted it, changed a few songs and put them all back, so that they are neatly sorted in alphabetical order by artist and not just randomness all over the place. I do use random mode, but some kind of sorting makes it easier to locate the songs you want in playlist browser mode.
Then i tried the radio, just for kicks. To my surprise, the radio worked just fine. It did erase all my saved stations though, but i can store those again.
So in the end it was a flash corruption bug caused by wrong commands issued by the chipset to the flash memory due to low battery. And as the "Disk Error" i got some time ago, it got fixed by a reformat.
Strangely though, as when i format the player the radio stations aren't erased, i think they are stored inside the firmware.
But still, i'm glad my radio works again. 8) Sometimes you just have to believe in miracles.