Gna, if anything can go wrong, it will go wrong.
0.8.4 contains an error when making a fresh install because the constant S9Y_PEAR_PATH is not defined. This is purely a cosmetic issue, the file is not required at this point, and the installation should be alright.
I've fixed this in SVN, but I currently hope a 0.8.5 release is not necessary...
Thanks a lot for showing this to me
Regards,
Garvin