My colleague Michael Svendsen has analysed an described the above mentioned problem further:
Don’t know what category I should post my issue in, hope the chosen one is okay after all
After upgrading from version 1.1.7 to 1.1.8 we have noticed some issues with some of our buttons.
We have replaced all image buttons with HTML/CSS ones, which worked like a charm in earlier versions of Magento.
After latest upgrade all buttons works in Firefox. However, in IE6/7 only image buttons (and buttons with onclick-parameter) is working. I think that this may be a little bug in your MVC framework..
Example of search-button in the mini-search form:
HTML/CSS-only: (only works in Firefox)
<button class="form-button"><span><?php echo $this->__('Search') ?></span></button>
IMAGE version: (works in both Firefox and IE)
<input type="image" src="<?php echo $this->getSkinUrl('images/btn_go.gif') ?>” alt="<?php echo $this->__('Go') ?>"/>
In earlier versions of Magentoo both versions worked in Firefox AND IE. Now the HTML/CSS version only works in Firefox :-(
Hope you have an idea what could be wrong/missing.
Looking forward hearing from you.