NTVDM: Teen Agent - mouse "stickied" to topleft corner

r64915, VBox 4.3.12.

Download the game from http://www.gog.com/game/teenagent (it's for free!). After GOG install it can be launched by double-clicking TEENAGNT.EXE. The intro scene can be skipped by pressing ESC (single lines of dialog are skipped by left click).

After the intro scene you appear with opened inventory. Mouse is stuck in top left corner and even if moved by keyboard arrows, it returns to the 0,0 corner immediatelly. Game seems to work well otherwise.

Attaching debuglog.