Open-uri cannot generate tempfile file exists

Has anyone else come across this error? It only seems to happen
intermittently. Any help would be greatly appreciated.

RuntimeError (cannot generate tempfile
`C:/WINDOWS/TEMP/open-uri.204.21’:
File exists - file exists: C:/WINDOWS/TEMP/open-uri.204.21):

file:/D:/tomcat/webapps/mirror_mirror/WEB-INF/lib/jruby-complete-1.1.1.jar!/tempfile.rb:39:in
`initialize’

file:/D:/tomcat/webapps/mirror_mirror/WEB-INF/lib/jruby-complete-1.1.1.jar!/open-uri.rb:303:in
`new’

file:/D:/tomcat/webapps/mirror_mirror/WEB-INF/lib/jruby-complete-1.1.1.jar!/open-uri.rb:303:in
`<<’

file:/D:/tomcat/webapps/mirror_mirror/WEB-INF/lib/jruby-complete-1.1.1.jar!/open-uri.rb:259:in
`open_http’

file:/D:/tomcat/webapps/mirror_mirror/WEB-INF/lib/jruby-complete-1.1.1.jar!/net/protocol.rb:381:in
`call_block’

file:/D:/tomcat/webapps/mirror_mirror/WEB-INF/lib/jruby-complete-1.1.1.jar!/net/protocol.rb:372:in
`<<’

file:/D:/tomcat/webapps/mirror_mirror/WEB-INF/lib/jruby-complete-1.1.1.jar!/net/protocol.rb:84:in
`read’

file:/D:/tomcat/webapps/mirror_mirror/WEB-INF/lib/jruby-complete-1.1.1.jar!/net/http.rb:2223:in
`read_body_0’

file:/D:/tomcat/webapps/mirror_mirror/WEB-INF/lib/jruby-complete-1.1.1.jar!/net/http.rb:2184:in
`read_body’

file:/D:/tomcat/webapps/mirror_mirror/WEB-INF/lib/jruby-complete-1.1.1.jar!/open-uri.rb:258:in
`open_http’

file:/D:/tomcat/webapps/mirror_mirror/WEB-INF/lib/jruby-complete-1.1.1.jar!/net/http.rb:1062:in
`request’

file:/D:/tomcat/webapps/mirror_mirror/WEB-INF/lib/jruby-complete-1.1.1.jar!/net/http.rb:2147:in
`reading_body’

file:/D:/tomcat/webapps/mirror_mirror/WEB-INF/lib/jruby-complete-1.1.1.jar!/net/http.rb:1061:in
`request’

file:/D:/tomcat/webapps/mirror_mirror/WEB-INF/lib/jruby-complete-1.1.1.jar!/open-uri.rb:249:in
`open_http’

file:/D:/tomcat/webapps/mirror_mirror/WEB-INF/lib/jruby-complete-1.1.1.jar!/net/http.rb:547:in
`start’

file:/D:/tomcat/webapps/mirror_mirror/WEB-INF/lib/jruby-complete-1.1.1.jar!/open-uri.rb:243:in
`open_http’

file:/D:/tomcat/webapps/mirror_mirror/WEB-INF/lib/jruby-complete-1.1.1.jar!/open-uri.rb:617:in
`buffer_open’

file:/D:/tomcat/webapps/mirror_mirror/WEB-INF/lib/jruby-complete-1.1.1.jar!/open-uri.rb:164:in
`open_loop’

file:/D:/tomcat/webapps/mirror_mirror/WEB-INF/lib/jruby-complete-1.1.1.jar!/open-uri.rb:162:in
`catch’

file:/D:/tomcat/webapps/mirror_mirror/WEB-INF/lib/jruby-complete-1.1.1.jar!/open-uri.rb:162:in
`open_loop’

file:/D:/tomcat/webapps/mirror_mirror/WEB-INF/lib/jruby-complete-1.1.1.jar!/open-uri.rb:132:in
`open_uri’

file:/D:/tomcat/webapps/mirror_mirror/WEB-INF/lib/jruby-complete-1.1.1.jar!/open-uri.rb:519:in
`open’

file:/D:/tomcat/webapps/mirror_mirror/WEB-INF/lib/jruby-complete-1.1.1.jar!/open-uri.rb:30:in
open' /lib/searcher.rb:47:inrun’
/app/controllers/mirror_mirror_controller.rb:36:in
search_and_parse_speed_bump' /gems/gems/actionpack-2.0.2/lib/action_controller/base.rb:1158:inperform_action’
/gems/gems/actionpack-2.0.2/lib/action_controller/filters.rb:697:in
call_filters' /gems/gems/actionpack-2.0.2/lib/action_controller/filters.rb:689:inperform_action_with_filters’
/gems/gems/actionpack-2.0.2/lib/action_controller/benchmarking.rb:68:in
`perform_action_with_benchmark’

file:/D:/tomcat/webapps/mirror_mirror/WEB-INF/lib/jruby-complete-1.1.1.jar!/benchmark.rb:293:in
measure' /gems/gems/actionpack-2.0.2/lib/action_controller/benchmarking.rb:68:inperform_action_with_benchmark’
/gems/gems/actionpack-2.0.2/lib/action_controller/rescue.rb:199:in
perform_action_with_rescue' /gems/gems/actionpack-2.0.2/lib/action_controller/base.rb:524:inprocess’
/gems/gems/actionpack-2.0.2/lib/action_controller/filters.rb:685:in
`process_with_filters’

/gems/gems/actionpack-2.0.2/lib/action_controller/session_management.rb:123:in
process_with_session_management_support' /gems/gems/actionpack-2.0.2/lib/action_controller/base.rb:388:inprocess’
/gems/gems/actionpack-2.0.2/lib/action_controller/dispatcher.rb:171:in
handle_request' /gems/gems/actionpack-2.0.2/lib/action_controller/dispatcher.rb:115:indispatch’
/gems/gems/actionpack-2.0.2/lib/action_controller/dispatcher.rb:126:in
dispatch_cgi' /gems/gems/actionpack-2.0.2/lib/action_controller/dispatcher.rb:9:indispatch’

file:/D:/tomcat/webapps/mirror_mirror/WEB-INF/lib/jruby-rack-0.9.jar!/rack/adapter/rails.rb:37:in
`serve_rails’

file:/D:/tomcat/webapps/mirror_mirror/WEB-INF/lib/jruby-rack-0.9.jar!/rack/adapter/rails.rb:44:in
`call’

file:/D:/tomcat/webapps/mirror_mirror/WEB-INF/lib/jruby-rack-0.9.jar!/jruby/rack/rails.rb:129:in
`call’

file:/D:/tomcat/webapps/mirror_mirror/WEB-INF/lib/jruby-rack-0.9.jar!/rack/handler/servlet.rb:22:in
`call’
:1

Got the same, after installing ultrapshinx, kind of strange.
Tried to reinstall attachment_fu too, but still the same.