stacktrace

Plugin is finished {:plugin=><LogStash::Inputs::S3 bucket=>"bucket_name", credentials=>["access_key", "secret_key"], region_endpoint=>"us-east-1", type=>"elb-access", sincedb_path=>"/dev/null">, :level=>:info, :file=>"logstash/plugin.rb", :line=>"59"}
A plugin had an unrecoverable error. Will restart this plugin.
  Plugin: <LogStash::Inputs::S3 bucket=>"bucket_name", credentials=>["access_name", "secret_key"], region_endpoint=>"us-east-1", type=>"elb-access", sincedb_path=>"/dev/null">
  Error: no time information in ""
  Exception: ArgumentError
  Stack: file:/path/logstash-1.4.1/vendor/jar/jruby-complete-1.7.11.jar!/META-INF/jruby.home/lib/ruby/1.9/time.rb:267:in `parse'
/path/logstash-1.4.1/lib/logstash/inputs/s3.rb:261:in `sincedb_read'
/path/logstash-1.4.1/lib/logstash/inputs/s3.rb:147:in `process_new'
/path/logstash-1.4.1/lib/logstash/inputs/s3.rb:137:in `run'
org/jruby/RubyKernel.java:1521:in `loop'
/path/logstash-1.4.1/lib/logstash/inputs/s3.rb:136:in `run'
/path/logstash-1.4.1/lib/logstash/pipeline.rb:163:in `inputworker'
/path/logstash-1.4.1/lib/logstash/pipeline.rb:157:in `start_input' {:level=>:error, :file=>"logstash/pipeline.rb", :line=>"168"}
file:/path/logstash-1.4.1/vendor/jar/jruby-complete-1.7.11.jar!/META-INF/jruby.home/lib/ruby/1.9/time.rb:267:in `parse'
/path/logstash-1.4.1/lib/logstash/inputs/s3.rb:261:in `sincedb_read'
/path/logstash-1.4.1/lib/logstash/inputs/s3.rb:147:in `process_new'
/path/logstash-1.4.1/lib/logstash/inputs/s3.rb:137:in `run'
org/jruby/RubyKernel.java:1521:in `loop'
/path/logstash-1.4.1/lib/logstash/inputs/s3.rb:136:in `run'
/path/logstash-1.4.1/lib/logstash/pipeline.rb:163:in `inputworker'
/path/logstash-1.4.1/lib/logstash/pipeline.rb:157:in `start_input'

Hey, I am getting this same error now, I am using logstast 1.4.2, can you please tell me what was this about for you?