Just purchased and downloaded Eschalon Book I. Everything seems to go well until I go into an inventory screen such as when trying to purchase an item or when picking up items from chests, etc. At that point, sometime (although not always) the screen will freeze up and the only way to get out is to power off my computer and turn it back on. I am operating a Dell Inspiron 1525 which came pre-loaded with ubuntu hardy heron. Graphics card is an Intel Integrated GM965. I am not running Compiz or any other desktop enhancements. Any suggestions would be welcome.