Sandboxie 4.02 issue with Firefox

[Ashwin]

I updated my version of Sandboxie from version 3.76 to 4.02 recently and I am facing an issue with it.

I use it with Firefox 22 and Sandboxie crashes when I download a file or select to upload one. It gives me an error code but it doesn't really help

The files I am trying to save and upload are JPEGs and PNGs for blogging.

When I click on the upload button in wordpress, it brings up the file select screen, and just turns the popup to a white window, sort of like freezing it. And the only option I get when clicking on cancel or the close button is "Firefox has stopped responding, Wait or close the app" and I have to close it.

This is the same with saving files too. It does not happen always though, only when I have the browser running for an hour or more, so i am guessing it may be a memory leak or something.

Edit: The error i get is something like "Failed to communicate with Sandboxie". I will try to get a screenshot and possibly the error code and later downgrade to 3.76
I use Tab mix plus to save my sessions, but still this is very annoying and interferes with my work.