The same text string is used for the value and the id of the submit button. This causes an error because a space is not permitted in the id.
I changed line 8 from:
<input type="submit" class="button" id="<?php echo $VM_LANG->_('PHPSHOP_PARAMETER_SEARCH_CHANGE_PARAMETERS') ?>" name="edit" value="<?php echo $VM_LANG->_('PHPSHOP_PARAMETER_SEARCH_CHANGE_PARAMETERS') ?>" />
to:
<input type="submit" class="button" id="change_parameters" name="edit" value="<?php echo $VM_LANG->_('PHPSHOP_PARAMETER_SEARCH_CHANGE_PARAMETERS') ?>" />
Note: The ID value does not need to be in the language file.
Regards
Phil
using J1.5.3 with vm nightly update from 8th Aug