Incorrect QID; the line (615) in Shadowmoon levelling guide should be changed from:

l Mushroom-Covered Chest |QID|33869|N|Mushroom-Covered Chest: Lootable object found at the bottom of the lake in Umbrafen.|M|52.87,24.85|RANK|3|

to:

l Mushroom-Covered Chest |QID|37254|N|Mushroom-Covered Chest: Lootable object found at the bottom of the lake in Umbrafen.|M|52.87,24.85|RANK|3|

Excellent catch. The old QID was for "Treasure: Elekk Horn".
Corrected on the website. Out in the next update.