I've been suspicious for a while now that I have a small leak somewhere in my system due to the fact that every few months I need to add a bit of coolant (I'd estimate the loss at about 3 or 4 drips per week), and with my system sealed the way it is there should be no evaporation of coolant at all. Today while poking around cleaning my fan filters and such I noticed some green deposits of some sort on the bottom of my block (bottom being the side facing down, not the side facing the CPU which I can't see without dismantling it) I'd really like to hear some opinions about what you all think this could be. I'm fairly sure it's my coolant, but I don't see how it could be getting to where it is as there's no deposits/discoloration at all connecting the bad-looking area to the barbs/fittings, I think the coolant may be leaking from the side of the block that is mounted to the CPU, which I can't see at all without dismantling the system (which I plan on doing when I have more free time after seeing this). Anyways, it's hard to describe, so I took some pictures. These are pretty much at the limit of what my crappy old digi-cam can do, but I've left them uncompressed/cropped for full detail. If you want any other pics that I could try and get without dismantling please ask - when I do get time to take it apart I'll post pics from the other side.
Edit:
A few more details in questions I've been asked in IRC for future readers...
The block is a Maze-2, and it's been running in that system with no maintenence done to it other than occasional topping-up of the coolant for almost one year now. (the amount and frequency I need to add coolant is how I estimate the leak-rate). And if you're wondering, that orange thing on top of the block between the barbs is a flat thermistor.
