The roads I take...

I found the following question being raised on German newsgroups, but I guess there's more people interested in this:

Short version:
If you're not using a Mac, switching from 8.0 to 8.0.1 doesn't really help, so we only offer that update for Macs, on all other, 8.0 is just as good, as long as it runs.

Long version:
8.0.1 fixes exactly two things over 8.0:
1) A crash with the newest version of Apple's Java plugin for Mac (the bug is in that new Java version from Apple, but we can work around it with a small patch on our side).
2) On Windows, we're blocking old versions of Roboform that cause 8.0 to crash on startup, we only allow newer versions that don't cause that crash. In case 8.0 is already running, i.e not crashing when starting Firefox, this update doesn't really help anything, and we're avoiding to send people an update when they have no benefit of it, so we don't disturb them. If 8.0 is installed but crashing on startup (because of old Roboform), we don't even get to where an update would be installed. The only thing that helps those people is to manually download 8.0.1 and install it freshly - and actually download a new Roboform version that works with it.
Because of that, 8.0.1 is being offered to all versions (starting with 4.0, incl: 8.0) on Mac OS, but on Windows or Linux only for 4.0-7.0.1, because it doesn't offer any benefit to all the others.

So, in the end, if you're installing a fresh version, 8.0.1 is the right choice, but you don't need to install an update where it's not being offered automatically.