Every so often I get curious about nutrition and whether my diet is actually a healthy one. Over the years I've used a program called NUT, which is a really great console program that uses all the data from the USDA National Nutrient Database for Standard Reference. A couple days ago I downloaded the latest version and compiled it on my MacBook Pro. Thanks to the genius of writing simple, portable C code that builds with gcc, it compiled perfectly (not even a single warning) and I was off and running.
Unfortunately I was having a little trouble deleting the 26,642 gram (58+ pound) apple I accidentally entered for lunch today, and because I had the source code available, I discovered a buffer overflow error in the menu entry code. (A buffer overflow is sort of like when a form asks for your first name but only has room for six letters, and instead of stopping at C-h-r-i-s-t you continue to write the rest of your name into the following boxes not designed for your first name.) So I wrote to the author. An hour later, he wrote me back to thank me for finding the bug. Along the way he found a couple more, fixed them, and released a new version.
Timeline: Find a bug before dinner. Contact author. By the time I'm having my first beer, the program has already been fixed.
Try getting that kind of support from your commercial vendor.