I split from my EXH a couple of years ago. There wasn't too much animosity and we divided our things without too much hassle when selling the house except for one item. There was a stunning Laura Ashley dining table that I had bought at a really good price in a sale, we debated over who should get it as we both really wanted it. Eventually I backed down and let him take it. I didn't think too much about it at the time, I was moving back in with my parents temporarily and didn't know where I'd end up or if I'd even have space for it so I thought fine, he could have it.
Now I'm buying a new place that it would look perfect in. I know his place isn't big enough for it and that he has stuff in storage so I assumed it was in there. I called and asked if he happened to still have it and if so and he wasn't going to be using it could I have it. Turns out, when we left our old house he gave it to the new buyers for free because they liked it!! This was just after we'd been arguing over it and he knew how much I wanted it, yet he then just turned around and gave it to someone else that he didn't even know!
I found this out a couple of months ago and now every time I'm looking at tables for my new place it pisses me right off! My EXH had this thing about being a 'nice guy' and wanted everyone to see him that way, but was worse with people he didn't really know so I know this will have just been a way of being 'such a nice guy' to the buyers of our old house rather than a spiteful act against me but it still sticks in my craw!
What small things has someone done to you that still pisses you off ages later?