Would installing different versions of libssl cause problems?

Would installing different versions of libssl cause problems?

I am trying to install testing version of Spotify on Debian. It's a
testing version and they say it's for Debian Squeeze, my Crunchbang is
based on Debian Wheezy, but I'm trying to install it anyway.
It says:
The following packages have unmet dependencies:
spotify-client : Depends: libssl0.9.8 but it is not installable
E: Unable to correct problems, you have held broken packages.
In synaptic manager i see that I have libssl1.0.0. So is it possible to
install libssl0.9.8? And would that cause any problems or conflicts
between the versions installed?