Internet Explorer CSS Filter Bug with Form Input Field

This bug seems to effect form input text fields which are contained in a div styled with Microsoft's CSS filters. In the dropshadow box, if you type in a long string of characters that stretch beyond the form input field size, you will not be able to scroll backwards with the left arrow key. I was only able to test this out on IE 6 browsers on NT, 2000 and XP.

DropShadow Box

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No Filter Box

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Note: You can scroll back with the mouse using click & drag or by holding down the shift key while pressing the left arrow key.

While using the left arrow key the cursor seems to move back by the correct amount of characters but never reaches the first character.

The bug occurs when using any of the Microsoft CSS filters. Dropshadow, alpha, blur, etc...