Error installing hobbit: librrd2-dev conflicts with librrd0

["Miranda, Marjorie (GE, Corporate, consultant)" <marjorie.miranda (at) ge.com>]

Hi,
I get the error when attempting to install hobbit 4.2.0, librrd0 1.0.49,
RRDTool 1.2.15 on Ubuntu 7.04 :

$ sudo dpkg -i librrd0_1.0.49-1_i386.deb
dpkg: regarding librrd0_1.0.49-1_i386.deb containing librrd0:
    librrd2-dev conflicts with librrd0
     librrd0 (version 1.0.49-1) is to be installed.
dpkg: error processing librrd0_1.0.49-1_i386.deb (--install):
 conflicting packages - not installing librrd0 Errors were encountered
while processing:
 librrd0_1.0.49-1_i386.deb


Is there a list of compatible versions to use when installing Hobbit?

Thanks a bunch!
Marjorie