Yahoo options

Every once in a while, Yahoo changes things: URLs, symbols etc. Recently, I've been getting e-mails complaining that a certain spreadsheet (that downloads option data) isn't working. So I try to fix it ... in vain. Then I read this (from the Yahoo web site): Note: The consolidation of changes in options symbology will happen over a period of time from Jan 2010 to May 2010. Note the time period: Jan, 2010 to May, 2010. I reckon I'll wait for a month or three before I try again.