After putting up with my clutch squeaking for the last couple of months (consistent squeak and notchy pedal feel, in hot or cold weather), I took my car in to the dealer yesterday to get it checked.

The service manager spoke to a tech at Honda Australia about the problem. Apparently Honda has now produced a new technical bulletin, to be sent to all Australian dealers this week, that documents a lengthy procedure to fix the problem permanently (assuming that's possible with stock parts). My dealer suggested that more than just the master cylinder was likely to be replaced, but the downside is they'll need the car for at least two days in order to perform all the work required.

But if it prevents the problem from reoccurring, and saves Honda the cost of x master cylinder replacements (as has been the case for many posters in this thread), then it'll be worthwhile. Fingers crossed.