Problems with Downloading Stock Prices

[Richard Geddes]

I've been using GNUCash 2.0.5 on Ubuntu 7.04 for the last several
months.  Set up some stock investments and would download the latest
stock prices with Tools -> Price Editor -> Get Quotes.  This worked ok
until about a week ago.  Now I get a message "There was an unknown error
while retrieving the price quotes." 

Can someone help me troubleshoot this problem?

Thanks
Richard