[xwiki-users] 1.6 to 1.8.1 upgrade problems

Hello, I have just updated my version 1.6 Xwiki to the latest 1.8.1 and i imported the new web XAR. The wiki is mostly functioning fine, however some features are not displaying correctly. : The calendar no longer displays, instead i get the following code shown: --- $cparams.put("categories", $rqcategories) $cview.getHTMLCalendar($cparams, "") --- : Office imported does not display options correctly, instead i get: --- xe.officeimporter.import.options xe.officeimporter.import.filtering --- : I also see the following error in tomcats log, but i believe this can be safely ignored. --- SEVERE: Exception fixing docBase: {0} java.io.FileNotFoundException: /usr/local/apache-tomcat6.0/webapps/wiki/META-INF/MANIFEST.MF (No such file or directory) at java.io.FileOutputStream.open(Native Method) at java.io.FileOutputStream.<init>(FileOutputStream.java:179) --- Any help would be appreciated. Thanks. -- Intertainservices 4101 Yonge St., Suite 506 Toronto, Ontario, M2P 1N6 Phone: +1 416 225-8475 x303 Fax: +1 416 535 9094 Cell: +1 416 562 5378 E-mail: mike.jakubik(a)intertainservices.com This message, including any attachments, is privileged and may contain confidential information intended only for the person(s) named above. Any other distribution, copying or disclosure is strictly prohibited. If you are not the intended recipient or have received this message in error, please notify me immediately by reply email and permanently delete the original transmission, including any attachments, without making a copy.