My S90 just bit the dust at Lembeh after my Canon housing leaked just as you described. Camera worked fine for a bit, then just wouldn't turn on again. I sent it in to Canon for a warranty repair (didn't know it was water damage, given that the camera didn't feel wet when I took it out of the housing and it kept working): they found corrosion from water damage inside. I've now sent the housing to them (was just going to take care of the mould lines myself, but now...). Waiting to hear back from them.
I've had 3 other Canon housings (for a G7, G10, and 870is). All worked fine. My guess is the S90 mould needs a little work. Anyone doing their own sanding might consider sending a note to Canon technical support as well, so they know to look.
I've had 3 other Canon housings (for a G7, G10, and 870is). All worked fine. My guess is the S90 mould needs a little work. Anyone doing their own sanding might consider sending a note to Canon technical support as well, so they know to look.