<br>I've found a possible bug, using examples/custom-control.html page and also using the OpenLayers Home page.<br>FireBug error console said this:<br>"evt.xy has no properties<br>./Control/Navigation.js<br>Line 67"
<br><br>To reproduce this error try the following steps:<br>1) move mouse pointer into the map.<br>2) refresh web page (with F5 or Ctrl+F5) and take care to don't move the mouse.<br>3) when the page is again ready try to scroll the wheelMouse (without moving the mouse!), now the error occur.
<br><br>The bad thing is that: if you don't move the mouse you don't have mouse position when fire wheel.<br><br>The bug is located in MouseWheel.js on line 88:<br>"e.xy = this.mousePosition;" <br>because
this.mousePosition is "null" on start up.<br><br>This is a Mozilla Bug.<br><br>A trivial work around is to disable wheel event <br> in MouseWheel.js on line 84 with this substitution:<br><br>"- if (delta) {"
<br>"+ if (delta && this.mousePosition) {"<br><br>The very very strange thing is an analogous bug in GMaps :)<br>