Wicket.Event.addDomReadyEvent is broken in IE since 1.5.1. I identified
WICKET-4080 as the cause of the problem: onreadystatechange with readyState="loaded" is sometimes fired before the document is fully loaded, causing scripts that reference DOM nodes to fail.
See http://msdn.microsoft.com/en-us/library/ms534359%28v=vs.85%29.aspx for the order of the readystate events.
The attached quickstart reproduces the issue (you may need to F5 a few times as it does not happen reliably). The actual JS error is:
SCRIPT5007: The property "onkeydown" has no value: The object is null or undefined
wicket-autocomplete-ver-1317728550188.js, Line 91 Character 9
|Transition||Time In Source Status||Execution Times||Last Executer||Last Execution Date|
|1d 20m||1||Martin Grigorov||07/Oct/11 08:52|
|Status||Open [ 1 ]||Resolved [ 5 ]|
|Assignee||Martin Grigorov [ mgrigorov ]|
|Fix Version/s||1.4.19 [ 12317570 ]|
|Fix Version/s||1.5.2 [ 12318078 ]|
|Resolution||Fixed [ 1 ]|