"recording interrupted"

[Lee Saxon]

It's not the recording limit, it happens after ~90 seconds.

I can't believe my class 10 20MB/s SDHC cards are too slow to record at 24 Mbps.

What else might cause this error?

 

[Granjow]

For sure they are not too slow, since they work perfectly well with the Canon DSLRs which have poorer compression.
Is the card okay? I.e. no write errors? Same error with other cards? Can you record multiple shots on the same card, with always the same error?
I've got a class 10 … no, even a class 6 here, from Transcend, and recording works fine.