Here is a bug which is actually in Adobe Dreamweaver prior to CS3 versions. The reason I am posting it in here will become apparent.
The bug causes Dreamweaver to crash if a file with 8129kb size is present in the site directory, well in vB 4.0.x there is a file called "payment_gateway.php" that appears as 8kb but the 'actual size on disc' shows as 8129kb - so if anyone is using DW and finding it crashing all the time this is your answer, you need to open the file using notepad and add a few characters to the commented out section at the bottom of the file.
Credit to the author of the article and more information -
Dreamweaver 8129kb bug