If it's that little hole in the corner by the coving if you had cut the tile to the ceiling it probably would have covered it, if not you could use a bit of caulking after tiling if needed.
I thought this was clever - something a bit like this for boxing. I also like the idea of a slope so water drains off it (until someone steps on it)!!!!
Yes its the cubicle I'm tiling. The boxed pipe is close to it and water could spray that way. Tiling is just so much fun - can't tell you how much I'm enjoying it!
Mr Fish - I"ll let you know when they fall off.