b2 REFRESH Problem

#HOW TO FIX: NOT UPDATING / CAN'T REFRESH#
by Jaleco

Internet Explorer won't refresh your b2 properly, thus your recent posts do not appear
unless you empty your internet files, or force refresh (CTRL+F5)... 

Here's what to do: 

Open blog.header.php, look for these lines: 


@header ("Last-Modified: $last_modified_header"); 
@header ('ETag: "'.md5($last_modified_header.$pagenow).'"'); 


Replace them with these lines: 

if (!$is_winIE) { 
@header ("Last-Modified: $last_modified_header"); 
@header ('ETag: "'.md5($last_modified_header.$pagenow).'"'); 
} 


Next, look if you can refresh in MSIE. You may have to empty your temp internet files first,
but after you have done this, you won't have to worry about refreshing ever again.
I promise. 

Source:
http://cafelog.com/board/viewtopic.php?t=5500