Idle fires repeatedly in IE8

I have the following code in my map - the initial idleFired is generated when 
the map is initially loaded, and then I set a listener in case of user drags, 
zooms etc.

This works fine in Firefox and Chrome but in IE8 the idle event seems to fire 
immediately it is set in this routine. I have tried clearing listeners (I 
always use addListenerOnce so this should not be needed) but makes no 
difference.

function idleFired()
{
alert("idle fired");
google.maps.event.clearListeners(g_map, "idle");
$('bookmark').innerHTML=''; // no longer accurate
// OK - has anything changed?
n=g_bounds_north;
s=g_bounds_south;
e=g_bounds_east;
w=g_bounds_west;
boundsFromMap();
if ((n!=g_bounds_north) || (s!=g_bounds_south) ||(e!=g_bounds_east) 
||(w!=g_bounds_west))
    {
    getMarkers();
    }
else
    {
    alert("Add idle listener after fired");
    google.maps.event.addListenerOnce(g_map, "idle", idleFired);
    }
}

What steps will reproduce the problem?
1. Always gets triggered for me - I display my map and then move it and in IE 
get the two alerts in a loop, which does not happen in other browsers.
2.
3.

Expected result:
Idle should only fire once when the map is moved

Actual result:
[Describe what actually happened]

Version: ###

Browser / Operating System:
[e.g. FF3 / MacOSX]

Additional comments:
[Enter any additional comments about the bug here.]

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Original issue reported on code.google.com by davidt...@gmail.com on 12 May 2011 at 6:44

Merged into: #86

killlllme / google-maps-utility-library-v3

Idle fires repeatedly in IE8 #87