Very easy feature request - increase the size of the e-mail subject box on the admin/user/invite/settings page. Right now it is limited to 30 characters, but using the token module with replacements you can very easily fill up the box. For example, including a single content profile field such as [profile-field_givenname-raw] already takes up 29 of the 30 available characters.
This would be done via editing invite_admin.inc and changing the #size in the following area of the code:
$form['email']['invite_subject'] = array(
'#type' => 'textfield',
'#title' => t('Subject'),
'#default_value' => variable_get('invite_subject', t('[inviter-raw] has sent you an invite!')),
'#size' => 30,
'#maxlength' => 64,
'#description' => t('Type the default subject of the invitation e-mail.') .' '. t('Use the syntax [token] if you want to insert a replacement pattern.'),
'#required' => TRUE,
I would suggest changing it to something fairly lengthy, such as 90 characters to allow for token replacement space. Thank you.