[BrRsn]

Stuff like that is actually pretty common. More than anything, the first pic is probably this:

The outsides of the foundations are poured first, then a couple weeks later the actual concrete for the floor of your home is poured. This usually causes an uneven surface between the foundation and the floor of your home. The tiler just want's to make everything look good, so what does he do? He puts a little more quicket/thinset underneath the tile to get it even. Over the years weight on it etc. makes it crack.

Second pic: you may not know this, but that caulking/silicone they use shrinks over time. It may be a crack, or it may just be (most likely) shrinkage.

Also, it's pretty common for a house to settle within the first 5-10 years of being made. I wouldn't worry too much about it, IMO it's purely cosmetic. On all the houses I've seen that my dad's worked in/made these cracks develop sooner or later. Most of the time they're small, sometimes major .. but purely cosmetic. Also, if your foundation was shifting, you would see a LOT of cracks all throughout the house, doors would stop shutting properly, and it would be really noticeable, the way a house is built, everything is connected to everything. So a single shift in the foundation would be apparent really fast.

The way houses are made in vancouver (modern ones anyhow) I'd say it's pretty much impossible for them to shift. The foundation is poured onto bedrock and tied together completely. If you're house is on peat/some other crappy soil they (the builder) have to pay to have thick wooden posts put down to bedrock, and the foundation rests ontop of that. I'm not too sure about richmond though.