Indeed Michele. When I wiped off everything and reinstalled all from scratch inciuding the add-on plugins, this issue has disappeared. Hence it was an environment issue. Probably something leftover was lurking somewhere. Thanks.

I'm getting an error on running upgrade.php with this plugin enabled

elgg 1.8.11 - any ideas how to fix?

Fatal Error.

Redirect could not be issued due to headers already being sent. Halting execution for security. Search http://docs.elgg.org/ for more information.

SecurityException Object
(
[message:protected] => Redirect could not be issued due to headers already being sent. Halting execution for security. Search http://docs.elgg.org/ for more information.
[string:Exception:private] => exception 'SecurityException' with message 'Redirect could not be issued due to headers already being sent. Halting execution for security. Search http://docs.elgg.org/ for more information.' in /home/content/59/8407459/html/elgg/engine/lib/elgglib.php:151
Stack trace:
#0 /home/content/59/8407459/html/elgg/index.php(22): forward('activity')
#1 {main}
[code:protected] => 0
[file:protected] => /home/content/59/8407459/html/elgg/engine/lib/elgglib.php
[line:protected] => 151
[trace:Exception:private] => Array
(
[0] => Array
(
[file] => /home/content/59/8407459/html/elgg/index.php
[line] => 22
[function] => forward
[args] => Array
(
[0] => activity
)

)

)

[previous:Exception:private] => 
)

just delete the de.php language file.... that will work

Yes! Thanks! That fixed it

good plugin after  deleted da.php

I had some problems in Spam Login Filter plugin related with this: http://www.jamescrowley.co.uk/2007/06/19/gotcha-http-x-forwarded-for-returns-multiple-ip-addresses/

Just need to add this in line 53 of start.php:
if (($pos = strrpos($ip_address, ",")) !== false) {
$ip_address = substr($ip_address, $pos+1);
}

Can you release a new version? :)

will this work for elgg 1.7 version?

@Leee: version 1.2a is the latest release of the Tracker plugin that will work on Elgg 1.7.