Amazon Kindle white screen of death crash

Christmas this year (2010) yielded a lovely surprise in the form of a new Amazon Kindle and I am very pleased with it.  The quality of the screen is excellent and the gadget itself is very intuitive and easy to use. However, I have occasionally experiences times when loading a book or using the browser where I get a plain blank screen (the 'Amazon Kindle white screen of death crash').  I am presuming that this is a memory issue as it only happens on large books or on javascript heavy web sites.  If left long enough it usually resolves itself but I have had one issue that wouldn't fix itself.

The solution was to slide the power slider and hold it for about 30 seconds until the device reset itself.  When this happens you will see the Amazon Kindle 'Tree' logo appear and a progress bar.  Once it has reset all will be back to normal.

If anyone has any other ideas as to why this happens or has other solutions please leave a comment.