Resource temporarily unavailable

Hi,
I have been testing firecat(a Server-Side JavaScript Webserver -
http://firecat.nihonsoft.org/firecat_1_0_x/beta_1/install_sablevm.nsp) on
SableVM SDK 1.13 and everything seems to be ok. But after about 30 seconds
after every request, I get the following Exception:

java.io.IOException: Resource temporarily unavailable
   at gnu.java.net.PlainSocketImpl.nativeRead (PlainSocketImpl.java)
   at gnu.java.net.PlainSocketImpl.access$0 (PlainSocketImpl.java:73)
   at gnu.java.net.PlainSocketImpl$SocketInputStream.read
(PlainSocketImpl.java:420)
   at org.w3c.www.mime.MimeParser.parse (MimeParser.java:332)
   at org.w3c.www.mime.MimeParser.parse (MimeParser.java:360)
   at jp.nihonsoft.firecat.http.w3c.W3cHttpWorker.processRun
(W3cHttpWorker.java:237)
   at jp.nihonsoft.util.StdThread.run (StdThread.java:61)
   at java.lang.VMThread.callRun (VMThread.java:124)
   at java.lang.Thread.callRun (Thread.java:398)
   at java.lang.VirtualMachine.runThread (VirtualMachine.java:137)

Is this a bug of SableVM or Classpath 0.19? Is there already a fix in
place? Thanks!
                                                                  David Fu.