Hard to know why there are so many error... http://thedailywtf.com/forums/68792/ShowPost.aspx

Hardcode path - http://thedailywtf.com/forums/32345/ShowPost.aspx

Redefine NULL - http://www.thedailywtf.com/forums/71684/ShowPost.aspx

Accident Recurrsive - http://thedailywtf.com/forums/71904/ShowPost.aspx

Excel display bug cause by float - http://www.joelonsoftware.com/items/2007/09/26b.html