Redmine

After upgrading our Redmine from 1.2.2 to 2.0.3 it became unstable (Redmine 2.1.0 the same behavior). It crushes periodically about 15-20 times per day. The log shows:

C:/Ruby187/lib/ruby/gems/1.8/gems/activesupport-3.2.8/lib/active_support/cache.r
b:587: [BUG] Segmentation fault
ruby 1.8.7 (2011-06-30 patchlevel 352) [i386-mingw32]

Our environment:
Windows 2003 server standrad sp2 x32

C:\redmine-2.1.0>rake about
About your application's environment
Ruby version 1.8.7 (i386-mingw32)
RubyGems version 1.3.7
Rack version 1.4
Rails version 3.2.8
Active Record version 3.2.8
Action Pack version 3.2.8
Active Resource version 3.2.8
Action Mailer version 3.2.8
Active Support version 3.2.8
Middleware Rack::Cache, ActionDispatch::Static, Rack::Lock, #<Act
iveSupport::Cache::Strategy::LocalCache::Middleware:0x3e4a6f8>, Rack::Runtime, R
ack::MethodOverride, ActionDispatch::RequestId, Rails::Rack::Logger, ActionDispa
tch::ShowExceptions, ActionDispatch::DebugExceptions, ActionDispatch::RemoteIp,
ActionDispatch::Callbacks, ActiveRecord::ConnectionAdapters::ConnectionManagemen
t, ActiveRecord::QueryCache, ActionDispatch::Cookies, ActionDispatch::Session::C
ookieStore, ActionDispatch::Flash, ActionDispatch::ParamsParser, ActionDispatch:
:Head, Rack::ConditionalGet, Rack::ETag, ActionDispatch::BestStandardsSupport, O
penIdAuthentication
Application root C:/redmine-2.1.0
Environment production
Database adapter mysql
Database schema version 20120731164049

C:\redmine-2.1.0>