Redmine

Hello,
I migrated from redmine 2.2 to 2.3 and got 500 error page when try to edit any user (e.g. users/1/edit). In log I found permission denied error for tmp/cache/900 folder. I permitted writing for everybody for tmp/cache folder. 500 error problem has been resolved, but in tmp/cache folder was created folder with nobody\nogroup owner\group. Is it OK? I did not have such problem for redmine 2.2...