Mouse input offset problem in web fullscreen

Hi,

I am having an annoying case reproducing only on very certain PCs. The problem is, once I go to fullscreen in the webplayer, all the gui buttons have an annoying y offset of input compared to the actual drawing. So when I place the mouse cursor above a button, the click and hover is recognized only when the cursor points at about the middle of the button and until about half the button height below the actual button. It as if the input rectangle is offset by about half the height of a button's graphics.

This happens on a PC with XP, IE6, directx 9.0c, 1024x768 LCD (a few dozens of them with same hardware).

Since unity does input and graphics from 1 function call (e.g. "if (GUI.button(...))", and it happens on all buttons, along all scenes, using several code solutions, I am wondering if this might be a weird unity issue.

In any case - did anybody encounter such an issue or have any solution suggestions for this?

(please note, that although this happens on specific hardware and software, it happens on dozens of the same PCs that have the exact same software installed and we need to be able to solve this for these PCs).