I re-edited and uploaded my wp-config.php file, and now I'm getting different errors on my home page:

Warning: session_start() [function.session-start]: Cannot send session cookie - headers already sent by (output started at /home/content/k/m/a/kmagyarics/html/wp-config.php:1) in /home/content/k/m/a/kmagyarics/html/wp-content/plugins/si-contact-form/si-contact-form.php on line 1770

Warning: session_start() [function.session-start]: Cannot send session cache limiter - headers already sent (output started at /home/content/k/m/a/kmagyarics/html/wp-config.php:1) in /home/content/k/m/a/kmagyarics/html/wp-content/plugins/si-contact-form/si-contact-form.php on line 1770

Warning: Cannot modify header information - headers already sent by (output started at /home/content/k/m/a/kmagyarics/html/wp-config.php:1) in /home/content/k/m/a/kmagyarics/html/wp-includes/pluggable.php on line 865

Any ideas? Thanks in advance!

remove the contact form and plugable plugins from teh plugin folder and try again

Thanks--I got rid of all the plug-ins, now I'm getting this error:

Warning: Cannot modify header information - headers already sent by (output started at /home/content/k/m/a/kmagyarics/html/wp-config.php:1) in /home/content/k/m/a/kmagyarics/html/wp-includes/pluggable.php on line 865

taken from http://faq.wordpress.net/view.php?p=7

How do I solve the “Headers already sent” warning problem?
Description: You get a warning message on your browser that says:

Warning: Cannot modify header information - headers already sent by
(output started at…

Reason and Solution :
It is usually because there are spaces, newlines, or other garbage
before an opening '< ?php' tag or after a closing '?>' tag, typically in
wp-config.php. This could be true about some other file too, so please check the file that gave you the error too (mentioned in the error message).