This new release includes two changes.
The first change is by idea from Doug Farley. When multiple datafiles are generated and updated from a single service check, the previous behaviour was to display data from all files in same graph. Instead graphs are now automatically split into one graph per datafile. This will make graphing of disks much easier in cases where multiple disks are checked by one servicecheck. Splitting graphs into for example MB and percent is still a manual process.
The second change is to use css and generate proper xhtml code. Patches submitted by Ton Voon. A new option has been added nagiosgraph.conf to point to stylesheet.