Problem with Views and Custom Formatter

tried using the regular non-dev version first, but it was throwing the same error.

I'm getting this error in a pop-up when I'm using it to render a date field in Views:

An AJAX HTTP error occurred.
HTTP Result Code: 500
Debugging information follows.
Path: /drupal/admin/structure/views/view/events_page/preview/page/ajax
StatusText: Internal Server Error
ResponseText:

It doesn't matter which token I use the error is always the same, and it's crashing my page.

All I'm trying to do is do a simple reformatting of the date output through views - who knew this would be such a maze.

Here is my basic formatter with tokens selected from those available:

<span class="date">[node:field-event-date:1:custom:j]</span>
<span class="date">[node:field-event-date:1:custom:j]</span>
<span class="month">[node:field-event-date:1:custom:F]</span>

Here is another error that's showing up:

Notice: Undefined index: in entity_token_custom_formatters_token_data_alter() (line 51 of/sites/all/modules/custom_formatters/includes/entity_token.inc).

I can't find anything on that one anywhere.

I don't know if this is due to a conflict somewhere, or what but it seems like I'm the only one having this problem. Anyone got any ideas?