What you do: Die by falling from a high place What happened: I had 31 levels of XP. When I got back to the place I died, I only had 5 levels laying there. That's not nearly close to the 1/2 XP that the Minecraft Wiki talks about. (Losing 25 levels because the server lagged and glass showed up when it wasn't there and I walked on it doesn't help much either) And yes, I realized I was being stupid and put "dieing" instead of "dying".
Store your EXP in trade signs, Something like this: [trade] $1000 1 exp:500 ***Put a high price so nobody's gonna buy it, then do /exp to know how much you have, and you can store it without being scared of loosing it by dieing! ;-)
I do it at a fairly high price, so if people do buy it, I get a good price for it. I don't do anything crazy like $1000, I do $3.50 or $4
