This happened to me too.
I had to manually get jquery.js from the original trac 0.11.7 (http://trac.edgewall.org/export/9783/tags/trac-0.11.7/trac/htdocs/js/jquery.js), put it in /usr/share/pyshared/trac/htdocs/js/jquery.js and link it from /usr/lib/python2.6/dist-packages/trac/htdocs/js/ to get everything working.
This happened to me too.
I had to manually get jquery.js from the original trac 0.11.7 (http:// trac.edgewall. org/export/ 9783/tags/ trac-0. 11.7/trac/ htdocs/ js/jquery. js), put it in /usr/share/ pyshared/ trac/htdocs/ js/jquery. js and link it from /usr/lib/ python2. 6/dist- packages/ trac/htdocs/ js/ to get everything working.