Oh my god!
I have found a solution for the IE7 problem in my shops after some days investigate now:
File: browse_1.php
I have included all DIVs in TABLES and my shops work now faultlessly and fast. Obviously the IE7 has a problem with these DIVs.
Old code:
<?php if( !defined( '_VALID_MOS' ) && !defined( '_JEXEC' ) ) die( 'Direct Access to '.basename(__FILE__).' is not allowed.' );
mm_showMyFileName(__FILE__);
?>
<div class="browseProductContainer">
<div class="browseProductImageContainer">
<script type="text/javascript">//<![CDATA[
document.write('<a href="javascript:void window.open(\'<?php echo $product_full_image ?>\', \'win2\', \'status=no,toolbar=no,scrollbars=yes,titlebar=no,menubar=no,resizable=yes,width=<?php echo $full_image_width ?>,height=<?php echo $full_image_height ?>,directories=no,location=no\');">');
document.write( '<?php echo ps_product::image_tag( $product_thumb_image, 'class="browseProductImage" border="0" title="'.$product_name.'" alt="'.$product_name .'"' ) ?></a>' );
//]]>
</script>
<noscript>
<a href="<?php echo $product_full_image ?>" target="_blank" title="<?php echo $product_name ?>"><?php echo ps_product::image_tag( $product_thumb_image, 'class="browseProductImage" border="1" title="'.$product_name.'" alt="'.$product_name .'"' ) ?></a>
</noscript>
</div>
<div class="browsePriceContainer">
<span class="browseProductSKU"> Art.-Nr.: <?php echo $product_sku ?></span>
<br />
<span class="browseProductTitle"><?php echo $product_name ?><span>
<br />
<span class="browseProductDescription">
<?php echo $product_s_desc ?>
<br /><br />
<a href="<?php echo $product_flypage ?>" title="<?php echo $product_details ?>">
<?php echo $product_details ?> >>></a></span>
<br /><br />
<span class="browseProductPrice"><?php echo $product_price ?></span>
<br />
<span class="browseAddToCartContainer">
<?php echo $form_addtocart ?>
</span>
</div>
</div>
New code:
<?php if( !defined( '_VALID_MOS' ) && !defined( '_JEXEC' ) ) die( 'Direct Access to '.basename(__FILE__).' is not allowed.' );
mm_showMyFileName(__FILE__);
?>
<div class="browseProductContainer">
<table width="100%" border="0"><tr><td>
<div class="browseProductImageContainer">
<script type="text/javascript">//<![CDATA[
document.write('<a href="javascript:void window.open(\'<?php echo $product_full_image ?>\', \'win2\', \'status=no,toolbar=no,scrollbars=yes,titlebar=no,menubar=no,resizable=yes,width=<?php echo $full_image_width ?>,height=<?php echo $full_image_height ?>,directories=no,location=no\');">');
document.write( '<?php echo ps_product::image_tag( $product_thumb_image, 'class="browseProductImage" border="0" title="'.$product_name.'" alt="'.$product_name .'"' ) ?></a>' );
//]]>
</script>
<noscript>
<a href="<?php echo $product_full_image ?>" target="_blank" title="<?php echo $product_name ?>"><?php echo ps_product::image_tag( $product_thumb_image, 'class="browseProductImage" border="1" title="'.$product_name.'" alt="'.$product_name .'"' ) ?></a>
</noscript>
</div>
</td><td>
<div class="browsePriceContainer">
<span class="browseProductSKU"> Art.-Nr.: <?php echo $product_sku ?></span>
<br />
<span class="browseProductTitle"><?php echo $product_name ?><span>
<br />
<span class="browseProductDescription">
<?php echo $product_s_desc ?>
<br /><br />
<a href="<?php echo $product_flypage ?>" title="<?php echo $product_details ?>">
<?php echo $product_details ?> >>></a></span>
<br /><br />
<span class="browseProductPrice"><?php echo $product_price ?></span>
<br />
<span class="browseAddToCartContainer">
<?php echo $form_addtocart ?>
</span>
</div>
</td></tr></table>
</div>
Of course I also have made all changes which were already posted here before. Unfortunately, I do not know whether these have contributed somehow for the solution.