[TYPO3-english] powermail 2 and strange upload file button

[Katja Lampela]

hi,
could someone please help me with this. I want to have a normal file 
upload button in the powermail form. For some reason the upload file 
button has this weird orange enourmous FILE UPLOAD background image.

The partials of this template is (sorry for the thunderbird line breaks):

<div class="powermail_fieldwrap_file_inner">
<f:form.upload id="powermail_field_{field.marker}" 
name="field[{field.uid}]" class="powermail_field powermail_file 
{vh:Misc.ErrorClass(field: '{field}', class: 'powermail_field_error')}" />
</div>

How can I change this to have the normal upload file button behaviour 
(button with my language "choose/browse file"). Can I change this in 
typoscript or do I have to change it via this template partials?

I have searched the manuals and googled it, just can't find. (sorry if I 
missed something obvious)

-- 
Kind regards,
Katja Lampela
www.lieska.net