How to install Quartus II Web Edition Software on Ubuntu 11.04

I just installed Quartus II 11.1sp1 Web Edition under Ubuntu 11.10, and it generated a couple of errors related to this thread. Since the original poster did not post his solution to the pixmap issue, I'll post it here.

The first issue is the default locale. For some reason perl does not pick it up correctly, Qsys generates the messages

Info: Starting classic module elaboration.
perl: warning: Setting locale failed.
perl: warning: Please check that your locale settings:
    LANGUAGE = (unset),
    LC_ALL = (unset),
    LC_CTYPE = "en_US",
    LANG = "C"
    are supported and installed on your system.
perl: warning: Falling back to the standard locale ("C").

so you have to issue the command

 sudo locale-gen en_US

and reboot (I'm not sure if the reboot is required, that was just the advice given on the web).

For the pixmap error, Qsys generates messages like

 (java:2050): Gtk-WARNING **: Unable to locate theme engine in module_path: "pixmap",

is fixed with

sudo apt-get install gtk2-engines-pixbuf

Cheers,

Dave