Opening outdated tiket caused "TypeError: 'NoneType' object is not iterable"

[Rucha]

I used to trac 12.1. At once I installed SVN Trac0.12 branch With Permissions of TiminsAndEstimation (i didn't forget make database upgrade without any problem). Newly created tickets work fine! Great! But all tickets opening caused

Oops…
Trac detected an internal error: 
TypeError: 'NoneType' object is not iterable

Python Traceback
Most recent call last: 
File "C:/Program Files (x86)/VisualSVN Server/trac/python/lib/site-packages/trac/web/main.py", line 511, in _dispatch_request 
File "C:/Program Files (x86)/VisualSVN Server/trac/python/lib/site-packages/trac/web/main.py", line 258, in dispatch 
File "C:/Program Files (x86)/VisualSVN Server/trac/python/lib/site-packages/trac/web/chrome.py", line 840, in render_template 
File "C:/Program Files (x86)/VisualSVN Server/trac/python/lib/site-packages/genshi-0.6-py2.5.egg/genshi/core.py", line 132, in __or__ 
File "C:/Program Files (x86)/VisualSVN Server/trac/python/lib/site-packages/trac/web/chrome.py", line 991, in inner 
File "build/bdist.win32/egg/evidence/ticket_webui.py", line 33, in filter_stream 
File "build/bdist.win32/egg/evidence/helpers.py", line 10, in ticket_finish 
File "build/bdist.win32/egg/evidence/helpers.py", line 115, in ticket_estimate_time 


System Information:

User Agent: Opera/9.80 (Windows NT 6.1; U; ru) Presto/2.5.24 Version/10.53Trac	0.12.1
Genshi	0.6
mod_python	3.3.1
pysqlite	2.3.2
Python	2.5.2 (r252:60911, Feb 21 2008, 13:11:45) [MSC v.1310 32 bit (Intel)]
setuptools	0.6c9
SQLite	3.3.4
Subversion	1.6.9 (r901367)
jQuery	1.4.2

Enabled Plugins:componentdependencyplugin 	0.1	c:\svnserve\trac\eqp\plugins\componentdependencyplugin-0.1-py2.5.egg
evidence-scheduling 	0.1.4.2	c:\svnserve\trac\eqp\plugins\evidence_scheduling-0.1.4.2-py2.5.egg
ticketsidebarprovider 	0.0	c:\svnserve\trac\eqp\plugins\ticketsidebarprovider-0.0-py2.5.egg
timingandestimationplugin 	1.0.6b	c:\svnserve\trac\eqp\plugins\timingandestimationplugin-1.0.6b-py2.5.egg

[Rucha]

Sorry! Forget to add:

But all '''old''' tickets opening caused

[Rucha]

Version without permissions works fine!

[anonymous]

Sorry! I removed unnecessary plugins. Now all braches work fine!

[Russ Tyndall]

Glad you got it working :)