I found that same notice when googling the error message.  Except that I am on 4.3.9 - the version before the one that is supposed to have the bug.

I am on a managed version of UNIX (RHEL 4) so I need to stay with the version of the PHP on the system.

I also found a few items outlining functions equivalent to unpack.

I run a lot of php software, some of it must use the unpack function, are you sure there isn't something specific to the data or the use of the command in your software?  It seems like many others are having this problem and just haven't looked in their log files to find the error message I found.

D.

I am having the problem where the screen refreshes, clears the recipient email and name fields aand all seems well - but nothing is sent.

In my messages file I get:

server1 httpd: PHP Warning:  unpack(): Type H: outside of string in <snipped joomlapath>/components/com_invite/invite.php on line 62


I am on PHP 4.3.9 on Joomla 1.0.11.

Thanks for a great component - can't wait to get it deployed!

D.

PS it would be nice to have a confirmation screen rather than rely on the absence of a little bit of data to indicate the request was processed because I think users will email me that nothing is happening.