I'm glad this thread was resurrected; I didn't catch it the first time around, but am reading it with much interest now.

I hesitate to add my two bits, as I have little expertise in glue types, instrument construction, etc. (I do have some experience with making tight joints, but I'll leave that for another thread). However, it seems to me that we're missing the obvious point here, which is -- don't subject your instruments to extremes of temperature or humidity in the first place. In my extremely humble opinion, you're just asking for trouble by doing this; if the glue doesn't fail, something else will. There's lot of excellent reading matter out there on how to maintain an instrument at something approaching normal temperature/humidity conditions (Taylor for one has made it something of a personal crusade). I suppose if we're all planning to take our guitars on that round-the-world rafting trip we've dreamed about, there might not be much we can do. But for most of us, heat your house, use a humidifier (or de-humidifier in some instances), don't leave your guitar in your car when you go to the beach, etc. Chances are this will prevent the majority of these types of problems, regardless of which glue your luthier of preference uses.

Whistle Stop (who will be sitting here waiting for one of the truly knowledgeable folks out there to tell me why I shouldn't have bothered psoting this)