Shop can't be connected (BO o.k.)

[jrahman]

After playing with Preference > SEO & URL, I can't connect the shop, getting "HTTP Error 500 (Internal Server Error)"

 

System description:

* PS 1.5.0.13 running locally on OpenSuse 12.1 (Linux desktop)

 

How problem started:

I was playing at BO: Preference > SEO & URL, changed the Shop domain from "localhost" to IP address of the host machine, saved. Could not connect, then changed back again to "localhost" and saved, but now I get HTTP 500 error (Internal server error).

 

I restarted HTTP server, doesn't work. But I could connect to the BO (admin site) without any problem.

 

I am pretty sure it is a minor problem, but don't know how to fix. Please help !