Date Picker problem in APEX 4.1

Hi,
I have developed one application in ApEx 4.0 and imported it in ApEx 4.1. In ApEx 4.1, while clicking the Date picker field (on calendar icon) the application is started giving below error :
Message: Unable to get value of the property '_curInst': object is null or undefined
Line: 17
Char: 1448
Code: 0
URI: http://*********/i/javascript/apex_4_1.min.js
I have gone through the below OTN link,But I do not have such scenario which has been discussed over there.
Apex 4.1 IR: $.datepicker._curInst' is null or not an object
Other scenario which I have tried:
In ApEx 4.1, Created a new application with one page having date picker, it is working fine. If I copy/import this page in my old application(which was imported from ApEx 4.0) then the date picker is showing the above error.
NOte: We are using IE 8 & 9.
Regards
Mohan

Hi,
We found the problem. The problem is due the file 'jquery.min.js' file we have uploaded in shared components --> images. Once we deleted then it is working fine.
Regards
Mohan

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Member of the APEX development team
My Blog: http://www.inside-oracle-apex.com
APEX Plug-Ins: http://apex.oracle.com/plugins
Twitter: http://www.twitter.com/patrickwolf
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