Contextual help for plugin

[frankpw]

Contextual help never shows unless I echo it in my added filter.

Excerpt from my plugin:

add_filter('contextual_help', 'fpw_cat_thumbs_help', 10, 3);

function fpw_cat_thumbs_help($contextual_help, $screen_id, $screen) {

global $fpw_cat_thumbs_hook;

if ($screen_id == $fpw_cat_thumbs_hook) {

$contextual_help = 'My help goes here...';

}
return $contextual_help;

}

That does not work!

function fpw_cat_thumbs_help($contextual_help, $screen_id, $screen) {

global $fpw_cat_thumbs_hook;

if ($screen_id == $fpw_cat_thumbs_hook) {

$contextual_help = 'My help goes here...';

echo $contextual_help;

}

return $contextual_help;

}

That works.

[solarissmoke]

Just tested and I can't reproduce this in clean installs of 3.0.4 or trunk - maybe another plugin is messing?