A DESCRIPTION OF THE REQUEST :
I want to install the JDK in /opt, so I go there as root run the installer from "/home/dinoklein/My Downloads"

I get the following error:
----
tail: cannot open `/home/dinoklein/My' for reading: No such file or directory
tail: cannot open `Downloads/jdk-1_5_0_07-linux-i586.bin' for reading: No such file or directory
----

which I belive is due to this line in the installer:
tail ${tail_args}+749 $0 > $outname

I believe double-quoting the $0 should take care of this.

JUSTIFICATION :
It would be nice for the installer to work from anywhere, without having to move it to a path with no spaces.