RRD Graphs Error

[ptt]

As can be seen on attached IMG, there is an error message on RRD "Cellular" Tab, all other Tabs are OK  ???

Edit:
        Reset the RRD data deletes the "Cellular" Tab ???
Tab which doesn't exist on previous version…. Test sytem, running 64Bits Version, updated from 2.0.1 --> 2.0.3 --> 2.1

[Gradius]

Same here.  Everything is fine, except that "cellular" thing.

[gregober]

All graph are broken on my system.

2.1-RC0 (amd64)
built on Sat May 25 08:57:31 EDT 2013
FreeBSD 8.3-RELEASE-p8