Vista Snipping Tool Rant

My version of Microsoft Windows Vista comes with a screen capture tool called the Snipping Tool.  It is a very useful tool which I often use.  With this tool you can capture a screen shot (snip) of any part of your screen and save it to the clipboard or to a file in a number of formats (HTML, PNG, GIF, or JPEG).  Available snip types include free-form, rectangular, window or full-screen. One day last week the Snipping Tool suddenly stopped allowing me to save a snip to a file.  No error messages or message of any kind.  Pressing the Save