Hi,

Sometimes we're seeing weird errors when browsing the UI. Unfortunately, we can't tell yet how to reproduce them as we haven't seen any pattern so far :(

Started GET "/hosts?utf8=%E2%9C%93&search=ndnd" for A.B.C.D  at Mon Oct 08 09:04:39 +0200 2012
  Processing by HostsController#index as HTML
  Parameters: {"utf8"=>"¿", "search"=>"ndnd"}
Operation FAILED: undefined method `minutes' for true:TrueClass
Read fragment views/tabs_and_title_records-54 (0.5ms)
Rendered home/_topbar.rhtml (3.0ms)
Rendered common/500.rhtml within layouts/application (22.5ms)
Completed 500 Internal Server Error in 40ms (Views: 25.5ms | ActiveRecord: 5.9ms)

Started GET "/" for A.B.C.D at Thu Oct 11 16:08:05 +0200 2012
  Processing by DashboardController#index as HTML
Operation FAILED: undefined method `+' for true:TrueClass
Read fragment views/tabs_and_title_records-54 (0.3ms)
Rendered home/_topbar.rhtml (1.1ms)
Rendered common/_searchbar.erb (10.2ms)
Rendered common/500.rhtml within layouts/application (24.0ms)
Completed 500 Internal Server Error in 47ms (Views: 28.9ms | ActiveRecord: 14.1ms)

Started GET "/hosts?utf8=%E2%9C%93&search=hostgroup+%3D+public+and+name+%7E+btb+and+not+has+last_report" for A.B.C.D at Thu Oct 11 15:45:01 +0200 2012
  Processing by HostsController#index as HTML
  Parameters: {"search"=>"hostgroup = public and name ~ btb and not has last_report", "utf8"=>"¿"}
Operation FAILED: undefined method `to_i' for true:TrueClass
Read fragment views/tabs_and_title_records-54 (0.7ms)
Rendered home/_topbar.rhtml (1.8ms)
Rendered common/_searchbar.erb (19.4ms)
Rendered common/500.rhtml within layouts/application (45.8ms)
Completed 500 Internal Server Error in 65ms (Views: 45.8ms | ActiveRecord: 10.7ms)

Foreman version: foreman-1.0.1-2.el6

We're using memcached as cache backend to store settings.

Attached is a full trace of an error similar to the second one. Ping me if you need any more information. Thanks!