I have "pngbehavior.htc" on my site to display transparency PNG's in IE properly by forcing it to filter them ... I found it somewhere on the web ... anyhow, it worked great for me in WP 1.2, I made my own smilies as PNG's and it was fine. I have some other PNG graphics I have on my sidebar as well.
Since upgrading to WP 1.5 the PNG graphics in IE looking at posts, i.e. smilies, aren't loading, but the PNG's in the sidebar work just fine in IE using pngbehavior.htc
What happens is that with pngbehavior.htc, in CSS the img tag has that file called up.
When IE loads a page with images, any png's will first load ugly as they do in IE if they are transparents, then they will reload nicely. pngbehavior.htc invokes the alpha filter and replaces the browser graphic reference with blank.gif, but then the browser displays the PNG graphic properly.
It works still in the sidebar PNG graphics fine, but inside posts, it doesn't work right. The graphic loads ugly and then reloads "nothing at all" it's coded in the page right, there is the img reference there, but something isn't working right. Something in some WP code is conflicting with it is all I can guess.
The smilies all show up in FF. So do my sidebar PNG's. In IE 6 the smilies don't show up in the end. Sidebar PNG's do show up right.
I've tried to add css classes in my CSS file. That doesn't change a thing. The fact that the ugly IE version of PNG loads first and then reloads nothing shows that pngbehavior.htc is being used in any case ... but it's just not working right in posts, but is in the sidebar. Most frustrating.
I have a couple of animated smiles and they are gifs. So only those few gif smilies are working in IE.
This is bothersome since my tone of writing does depend on the smilies appearing more oft than not. I have no desire to convert my smilies to GIFS.
Does anyone else use pngbehaviour.htc ... or know how it works and why it's not working in posts and comments in WP 1.5 ... but used to work before just fine as far as I can remember, and does work fine in the sidebar and did before too, just won't work right in the posts, and I really think it used to.
This is the link to the document about "pngbehavior"