Python invoking 32 bit X11 lib files instead of 64 bit while using Selenium Web driver

I have the same error on Scientific Linux 6, and tried changing the libraries as described here:http://code.google.com/p/selenium/issues/detail?id=2852

Firefox 64bit + x_ignore_nofocus fails because: In 64 bit mode, as we have see, the library x_ignore_nofocus is looking for libX11.so.6 on the way "/usr/lib/libX11.so.6" But this symlink /usr/lib/libX11.so.6 is reference to /usr/lib/libX11.so.6.2.0, which is 32bit library.

Changing the link didn't work for me, but I did not try patching selenium. Hopefully this will be fixed in the next release.

I had probably same problem and I fixed it although ugly:

My Error:

File "/usr/lib/python2.7/site-packages/selenium/webdriver/firefox/firefox_binary.py", line 81, in _wait_until_connectable self._get_firefox_output())selenium.common.exceptions.WebDriverException: Message: 'The browser appears to have exited before we could connect. The output was: Xlib: extension "RANDR" missing on display ":1023.0".\nFailed to dlopen /usr/lib/libX11.so.6\ndlerror says: /usr/lib/libX11.so.6: wrong ELF class: ELFCLASS32\n'

My environment:
Fedora 14 X64
Firefox: 3.6.24 X64
Selenium 2.20.0 (webdriver)

My Ugly but easy and working fix:
I did copy file:
/usr/lib/python2.7/site-packages/selenium/webdriver/firefox/x86/x_ignore_nofocus.so
into:
/usr/lib/python2.7/site-packages/selenium/webdriver/firefox/amd64/
(Note you may want to backup the original file in case it won't work for you)