Array to string conversion in RulesTokenEvaluator

Hi!

I'm not sure if this is a support request or a bug report, but...

Anyway, I've set up a rule using:
Views Rules 7.x-1.0
Rules 7.x-2.3
Mimemail 7.x-1.0-alpha2

I have two content types... one is a property, the other is subscribers to a property. There is an entity reference field on the subscriber's content type linking the two. My rule sends an HTML email to all subscribers when the property's status changes.

To make this work, I've set up a View Rule (in Views) to find all the subscribers for a property, then in the Rule I loop through the View, passing variables like the subscriber's email address, and first and last name.

This is when I hit the issue with Rules 7.x-2.2 with variable tokens not working properly in direct input mode. I updated to 2.3 and could now see the new syntax for the tokens for my variables in the Replacement Patterns list. If I use them, however, I get this error:

Notice: Array to string conversion in RulesTokenEvaluator->evaluate() (line 203 of /var/www/mysite/sites/all/modules/contrib/rules/modules/system.eval.inc).

My direct input code:
Dear <span style="text-transform:capitalize;">[field-first-name:value] [field-last-name:value]</span>,

Which results in the above error and this output:

Dear Array Array,

I tried changing the tokens to [field-first-name:0:value], and got no errors, but also no output.

This DOES work, though:

<?php 
print_r('Dear <span style="text-transform:capitalize;">' . $field_first_name['0']['value'] . ' ' . $field_last_name['0']['value'] . '</span>,');
?>

I'm just thinking that either I don't know how to use the tokens properly, or they still aren't working right quite yet. I'm okay with using my workaround, but thought it might be better long term for my client if tokens could be used instead. Thoughts? Am I just not using tokens right, or is this a bug?

Thanks!