The fix of #15822 caused another break. After installing 3.3rc2 from source, ls -ltc --full-time /usr/local/lib/python3.3/lib2to3/ shows:

-rw-------. 1 root root  1455 2012-09-09 20:55:36.475519602 +0300 PatternGrammar3.3.0.candidate.2.pickle
-rw-------. 1 root root 20862 2012-09-09 20:55:36.425520211 +0300 Grammar3.3.0.candidate.2.pickle
drwx------. 2 root root  4096 2012-09-09 20:55:33.681520171 +0300 __pycache__/
drwxr-xr-x. 4 root root  4096 2012-09-09 20:55:30.087520195 +0300 tests/
drwxr-xr-x. 3 root root  4096 2012-09-09 20:55:30.063457702 +0300 pgen2/
drwxr-xr-x. 3 root root  4096 2012-09-09 20:55:30.028520614 +0300 fixes/
-rw-r--r--. 1 root root 28046 2012-09-09 20:55:09.319519773 +0300 refactor.py
-rw-r--r--. 1 root root 28386 2012-09-09 20:55:09.279456945 +0300 pytree.py
-rw-r--r--. 1 root root  1114 2012-09-09 20:55:09.242458183 +0300 pygram.py
-rw-r--r--. 1 root root   793 2012-09-09 20:55:09.205457004 +0300 PatternGrammar.txt
-rw-r--r--. 1 root root  7075 2012-09-09 20:55:09.168457078 +0300 patcomp.py
-rw-r--r--. 1 root root 11624 2012-09-09 20:55:09.131457019 +0300 main.py
-rw-r--r--. 1 root root    67 2012-09-09 20:55:09.091644598 +0300 __main__.py
-rw-r--r--. 1 root root     7 2012-09-09 20:55:09.052457036 +0300 __init__.py
-rw-r--r--. 1 root root  6589 2012-09-09 20:55:09.014519602 +0300 Grammar.txt
-rw-r--r--. 1 root root 14533 2012-09-09 20:55:08.977519642 +0300 fixer_util.py
-rw-r--r--. 1 root root  6706 2012-09-09 20:55:08.940519615 +0300 fixer_base.py
-rw-r--r--. 1 root root 10011 2012-09-09 20:55:08.903519608 +0300 btm_utils.py
-rw-r--r--. 1 root root  6833 2012-09-09 20:55:08.865457147 +0300 btm_matcher.py


The pickles are now correctly newer than the Grammar texts, but are readable only by root. Quick chmod fixes this, but has to be done manually on systems with strict UMASK for root.