[Animayhem]

If I'm right, what he's saying is the forge no longer tells you the xp it will cost, just the gold cost for upgrading. It used to tell you both.
I just remember the cost in xp is 10% of the cost in gold.

That is correct. I have made things. If you have the gold and xp you can make the item without knowing how much xp you lost. Luckily I never got the above message as It seemed I was not that close between levels.

If the 10% is still accurate then that helps.

On a side note. Since many exploits used to get xp in the past have been modified, would it be possible to show the xp amount since leveling is now tied to time in game and note?
Time in game and note still would not be known just the ding sound.