The Yahoo Stock Ticker widget is a nice useful gadget to track stocks. I had switched to the Yahoo Finance Widget because it was offered as an "upgrade".
Recently I ran into the problem with the Yahoo Finance Widget where I cannot add new stocks and get the message "There was a problem fetching your search results" and "Please check your network connection or try searching again later". Bummer, so I went back tot he Yahoo Stock Ticker widget and low and behold- the same exact error message. I looked into editing the Yahoo Finance Widget database- apparently it uses SQL Lite to store the symbols and prices. I tried using SQL Lite Browser to edit the DB file but no luck. So I went back to to the Yahoo Stock Ticker because I remember that you can actually edit the stock symbols right into the Windows registry under:
Computer/HKEY_CURRENT_USER/Software/Yahoo/WidgetEngine/Wdgets/Yahoo! Stock Ticker/userSymbolPpreference
The whole thing looks a bit cryptic though, so I wrote a little webapp that will convert regular stock symbols into the Yahoo Stock Widget format to enter in the registry.
Access the Yahoo Stock Ticker widget stock symbol converter for the Windows registry
Even though technically it's not a fix, it's a workaround the add stock problem for the Yahoo Stock Ticker widget. Hope this helps!