I found BOM characters in http://ftp.drupal.org/files/projects/jquery_update-7.x-2.x-dev.zip
Please see the list of files in the attachment.
This may be causing issues with the Admin Configuration Menu disappearing.
Suggested solution
Here is How to remove BOM from UTF-8?
The files with the problems are as follows:
./sites/all/modules/jquery_update/replace/jquery/1.8/jquery.min.js
./sites/all/modules/jquery_update/replace/ui/AUTHORS.txt
./sites/all/modules/jquery_update/replace/ui/ui/i18n/jquery-ui-i18n.js
./sites/all/modules/jquery_update/replace/ui/ui/i18n/jquery.ui.datepicker-af.js
./sites/all/modules/jquery_update/replace/ui/ui/i18n/jquery.ui.datepicker-ar.js
./sites/all/modules/jquery_update/replace/ui/ui/i18n/jquery.ui.datepicker-az.js
./sites/all/modules/jquery_update/replace/ui/ui/i18n/jquery.ui.datepicker-bg.js
./sites/all/modules/jquery_update/replace/ui/ui/i18n/jquery.ui.datepicker-bs.js
./sites/all/modules/jquery_update/replace/ui/ui/i18n/jquery.ui.datepicker-cs.js
./sites/all/modules/jquery_update/replace/ui/ui/i18n/jquery.ui.datepicker-da.js
./sites/all/modules/jquery_update/replace/ui/ui/i18n/jquery.ui.datepicker-de.js
./sites/all/modules/jquery_update/replace/ui/ui/i18n/jquery.ui.datepicker-el.js
./sites/all/modules/jquery_update/replace/ui/ui/i18n/jquery.ui.datepicker-en-GB.js
./sites/all/modules/jquery_update/replace/ui/ui/i18n/jquery.ui.datepicker-eo.js
./sites/all/modules/jquery_update/replace/ui/ui/i18n/jquery.ui.datepicker-et.js
./sites/all/modules/jquery_update/replace/ui/ui/i18n/jquery.ui.datepicker-eu.js
./sites/all/modules/jquery_update/replace/ui/ui/i18n/jquery.ui.datepicker-fa.js
./sites/all/modules/jquery_update/replace/ui/ui/i18n/jquery.ui.datepicker-fo.js
./sites/all/modules/jquery_update/replace/ui/ui/i18n/jquery.ui.datepicker-fr-CH.js
./sites/all/modules/jquery_update/replace/ui/ui/i18n/jquery.ui.datepicker-fr.js
./sites/all/modules/jquery_update/replace/ui/ui/i18n/jquery.ui.datepicker-he.js
./sites/all/modules/jquery_update/replace/ui/ui/i18n/jquery.ui.datepicker-hr.js
./sites/all/modules/jquery_update/replace/ui/ui/i18n/jquery.ui.datepicker-ja.js
./sites/all/modules/jquery_update/replace/ui/ui/i18n/jquery.ui.datepicker-ml.js
./sites/all/modules/jquery_update/replace/ui/ui/i18n/jquery.ui.datepicker-nl.js
./sites/all/modules/jquery_update/replace/ui/ui/i18n/jquery.ui.datepicker-ro.js
./sites/all/modules/jquery_update/replace/ui/ui/i18n/jquery.ui.datepicker-sq.js
./sites/all/modules/jquery_update/replace/ui/ui/i18n/jquery.ui.datepicker-sr-SR.js
./sites/all/modules/jquery_update/replace/ui/ui/i18n/jquery.ui.datepicker-sr.js
./sites/all/modules/jquery_update/replace/ui/ui/i18n/jquery.ui.datepicker-sv.js
./sites/all/modules/jquery_update/replace/ui/ui/i18n/jquery.ui.datepicker-ta.js
./sites/all/modules/jquery_update/replace/ui/ui/i18n/jquery.ui.datepicker-th.js
./sites/all/modules/jquery_update/replace/ui/ui/i18n/jquery.ui.datepicker-vi.js
./sites/all/modules/jquery_update/replace/ui/ui/i18n/jquery.ui.datepicker-zh-TW.js
| Comment | File | Size | Author |
|---|---|---|---|
| jquery_update_bom_characters.txt | 1.49 KB | Refineo |
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