Edit the file /inc/tools/mtimport.ctrl.php

line 1617

global $exportedfile, $import_mode, $dispatcher;

and 1416

global $authors, $categories, $posts, $dispatcher;

Thanks - although you're reply was a bit confusing. Until I looked at the file in question, I didn't realise you meant 'add $dispatcher;' to the end of the relevant lines.

Er, never mind. Still getting same error... could you rephrase your comment just in case I'm doing the wrong thing?

Are you sure that you edited the above 2 lines, you can't get the same error if you did?

Yep, edited those exact lines (all I did was add in $dispatcher; right?) in the /inc/tools/mtimport.ctrl.php file, correct permissions set, cleared cache, text file in the blog root... 404 error with the exact same undefined variable error as before. Undid everything and redid it just to make sure :(

This is weird :-/
Try replacing the $dispatcher on that line

<form action="<?php echo $dispatcher ?>" class="center">

to

<form action="admin.php" class="center">

Yes, that did it! No errors, file imported fine.

Thanks so much! :)

No problem