Just a "heads-up" for those of you who may be thinking about using the new version of RRDtool (1.2.x) with Hobbit: Right now, it won't compile, because one of the RRDtool functions used by Hobbit has gotten some extra parameters.
I've fixed that, and made the Hobbit configuration tool also recognize the new version. So starting with 4.0.3, Hobbit should compile without any problems with RRDtool 1.2.x.
However, there's a bug in RRDtool that Hobbit triggers - causing all except one of the generated RRD-files to contain no data. So you must apply a patch to RRDtool 1.2.1 for it to work - it is available at http://www.hswn.dk/hobbitsw/rrdtool-1.2.1-rrdcreate.patch
I've sent the patch to the RRDtool maintainers, and it seems that they will fix this in the next release.
Henrik