I'm trying to implement bottom-to-top vertical text using CSS attributes in IE :
writing-mode: tb-rl;
filter: flipv fliph;

But I have encountered the following: the text is displayed with a grey shadow (instead of anti-alias).

It seems that the problem is caused by the "filter:flip" attribute. Does anyone have a work around? (If I write the same text without the "filter" attribute, the grey shadow disappears but my text is written top-to-bottom!)

Here's my stylesheet:

Code:
.verticaltext{
        font-family: Arial;
        font-size: 13px;
        font-weight:bold;
        color:#FF9100;
        position:absolute; top:1px; height:90px;
        width: 16px;
        writing-mode: tb-rl;
        filter: flipv fliph;
}
and here's the HTML:

Code:
<div class="verticaltext">Vertical Text</div>
I have also tried to use other CSS3 attributes like:
block-progression: ttb;
direction : rtl;

but they don't seem to work in IE.

Does someone know how to remove the grey shadow or know of another way to implement the bottom-to-top vertical text?