Warning: Missing argument 3 for exclude_node_title_node_view()

You have to replace the function definition in exclude_node_title.module:79 from:

function exclude_node_title_node_view($node, $view_mode, $langcode) {

to:

function exclude_node_title_node_view($node, $view_mode) {

Maybe this isn't related to Exclude node title, as hook_node_view() should have all three arguments passed, see http://api.drupal.org/api/drupal/modules--node--node.api.php/function/ho...

I have run into this with porting the location module too.
It seems to doco is wrong and there are only 2 params.
If you look at the implementations of blog_node_view(), forum_node_view() etc they only have 2.

I opened a doco issue here - #1102556: hook_node_view (maybe) has only two arguments

You are absolutely right, I must update the hook.
See latest DEV release.

Thanks,
Gabriel