I found another problem on my server today - the server that was just rebuilt and then my hosting company somehow ran my app as administrator even though I was very adamant it should not be.
Was it my hosting company that did this, or someone who accessed my server through the app or some other security hole...I don't know...but I went into the program error logging and some "invisible" program was set to not log errors in the Microsoft event logs.
You can check for this issue on your box by going to your system properties, click on advanced, and click on error reporting. Click the "choose programs" button to see if any programs you did not place in this area have been added to be excluded from error reporting.