1102 is the last safe patch. The latest patch, while adding new features like the Inferno difficulty mode, will strengthen the disc-check by checking the loaded drive for a 3 GB dummy file that's present on an original disc. Basically, if you use a fake ISO to avoid the disc check, it will no longer work unless it's the full image of the whole DVD unfortunately. (I believe this is the problem you're referring too.)
Unless you ordered the CD-ROM version, then you won't have this problem. Two 700MB ISOs is all that will occupy your hard drive.