[Plugin: Grunion Contact Form] Grunion not emailing all entries

The Grunion Contact Form plugin does not appear to be emailing all entries used in forms. It appears to be working fine on WordPress.com, but when I use exactly the same code on my own installation and one of my clients (who reported the bug to me), it is only sending the first few form fields.

Here is an example of the form code used:
[contact-form subject="Test blog Test form" to="[email protected]"] [contact-field label="Name" type="name" required="true" /] [contact-field label="Email" type="email" required="true" /] [contact-field label="Website" type="url" /] [contact-field label="Comment" type="textarea" required="true" /] [contact-field label="Bla" type="text" required="true" /] [contact-field label="Testing checkbox" type="checkbox" /] [contact-field label="New Field" type="select" options="Rar,Ray,Ron" /] [contact-field label="New Field" type="radio" required="true" options="rad1,rad2" /] [contact-field label="Text box" type="text" /] [contact-field label="New Field" type="select" required="true" options="Drop1,Drop2,Drop3" /] [contact-field label="And more text" type="text" /] [contact-field label="TEXTAREA1" type="textarea" required="true" /] [contact-field label="TEXTAREA2" type="text" /] [contact-field label="TEXTAREA4" type="text" /] [contact-field label="TEXTAREA5" type="text" /] [/contact-form]

and below is the response via email from two entirely separate WordPress installs:

Name: ryan
Email: [email protected]
Website: https://pixopoint.com

COMMENT
TEXTAREA5: textarea5

Time: Tuesday February 1, 2011 at 4:24 am
IP Address: 120.89.84.22

Sent by a verified Pressabl user.

And here is the response from WordPress.com:

Name: Ryan Hellyer
Email: [email protected]
Website: https://pixopoint.com/
Comment: COMMENT
Bla: BLA
Testing checkbox: Yes
New Field: Drop3
Text box: TEXT BOX!!!
And more text: ANDMORETEXT!!!!
TEXTAREA1: TEXTAREA1
TEXTAREA2: TEXTAREA2
TEXTAREA4: TEXTAREA4
TEXTAREA5: TEXTAREA5

Time: Tuesday February 1, 2011 at 4:12 am
IP Address: 120.89.84.22

Sent by a verified WordPress.com user.