[RCU] after click attachment RC freeze for 45 seconds

hi,everyone!

I'm new to roundcube, I tested RCMAIL 0.1rc and svn612 version on winxp+apache2.2.4+php5+mysql5 and redhatAS4+apache2+php4.3.9+mysql5, and MTA postfix + hmailserver,browser firefox and ie6, when I click attachment and click "open" or "save" or "cancle", switch back to RCMAIL, RCMAIL is just freezed, and after 45 seconds I can do anything, if I don't wait, I can use browser "refresh" botton and RCMAIL will work right now, what happens in the 45 seconds? I't just a intel error timeout? any idea?

and how can I debug the RCMAIL like some linux -vv switch and then output a very very verbose log?

thanks.

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