error while saving cache.

[Ravi Desai]

Hello all,
  I get the following error
--
Started GET "/" for 127.0.0.1 at 2013-07-31 11:01:25 -0400
Processing by HomeController#index as */*
  Rendered home/index.html.haml within layouts/application (85.0ms)
Warning. Error encountered while saving cache 86b3fe7c2060008df4ecf7c83b1194891f643520/application.css.sassc: can't dump anonymous class #<Class:0x4f
1392c5>
/home/ravi/.rbenv/versions/jruby-1.7.4/lib/ruby/gems/shared/gems/sprockets-2.10.0/lib/sprockets/context.rb:282 warning: singleton on non-persistent J
ava type Java::JavaLang::InternalError (http://wiki.jruby.org/Persistence)
Completed 500 Internal Server Error in 30082ms
--

* I've tried wiping everything from the tmp/ directory
* I've tried setting config.sass.cache = false in my environment files

Nothing has worked.  I keep getting this error.

Using:
* jruby 1.7.4 (1.9.3p392) 2013-05-16 2390d3b on OpenJDK 64-Bit Server VM 1.7.0_40-b31 +indy [linux-amd64]
* rbenv for everything else
** Sass 3.2.10 (Media Mark)
** sass-rails 4.0.0
** Rails 4.0.0

How do I fix this?  I just want to turn caching off and move on with my development.

TIA
-ravi