strange problem with Intenso 4GB SDHC card

[arne anka]

well, the card is a kingston 4gb class 4.
yesterday i downloaded a map with tangogps and meanwhile the fr went to  
suspend. afterwards a few directories were misisng.
trying
ls /media/card/Maps/om/adirectorynotthere/
gives errors (something w/ read access i think)
so i decided to delete the entire /media/card/Maps folder from within the  
fr -- but that fails with "read-only filesystem". and indedd magically the  
card is mounted read only.
mount /media/card -o remount,rw
changes that, but next thing i know is "read only filesystem".

not sure if that fits into the original problem with the fried boot sector.
is there a trac ticket where i may add those informations?