There's a thread on Mepislovers at the moment about a swap error message during boot. I noticed this out of the corner of my eye with my M7.5 external HDD but didn't think anything much of it at the time, as conky seemed to be happy all was well in the swap department once the system was up. I'll try to replicate it over the next few days but in the meantime, any thoughts?

I see when I boot up within the first few messages"activating swap [failed]" but further down /swap is turned on and works fine.

Just one of them things then, probably.