Nero Burning Issue: 4.7GB DVD's now read 4.4GB instead

Can anyone please help??!!!
I'm having an issue when burning to blank DVD'S.
I use nero vision to encode avi files to dvd as well as DVD shrink. Since November 07, blank 4.7GB DVD's now read at 4.4GB. This creates a problem, when i select fit to disc, the encoded data is encoded to 4.7GB (DVD size).
I then get the error message: there is not enogh space cannot burn this compilation to this disc.
This is happening on both of my PC's.
I have tried everything I know.
I have formatted the machines. Used different versions of Nero, tried finding drivers for my Lite-On RW DVD drives, had no luck, currently using windows driver. Used the firmware updates on TechSpot. Changed DVD media brands, speeds. Brought new Lightscribe DVD RW Drive.
The 3 DVD drives I have are:
(Lite-On LDW-451S)(Lite-On SOHW-812S)(ASUS DRW-1814BL)
As a last resort I changed my settings in both nero and DVD shrink to encode at 4.4GB. This created many DVD coasters and errored. I checked the error and it aparently means "incompatable media". Luckily I have around $100 worth of different DVD media lying around, so I eleiminated that. Now I have a lifetime supply of coasters :)
 
It's just a difference of marketing math vs computer math.
A DVD-\+R can hold about 4.37 gibibytes (GiB), which translates into roughly 4.7 gigabytes (GB). So your DVDs are perfectly fine. Also, refer to this quality guide for DVD\CD media.
 
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