When FF closes while getting new filter, PS Hangs

As reported elsewhere, Filter Forge sometimes closes while attempting to install new filters from the Library. (For me, this is intermittent.) When it happens, about 90% of the time it will cause PS itself to hang until a Force Quit.

If I close the FF dialog while it says "Save Image as..." instead of "Apply", and while the filter is still drawing, then PS always hangs.

This only happens when using the Filter Forge plug-in in PS, and only when the plug-in window is open at the time. (If I browse for new filters without the plug-in open, all is well.)

I have noticed that FF closing immediately after clicking the "Open in Filter Forge" button on the website is more likely to happen if the file I'm working on has not been saved (ever), if I have more than one file open at the time (especially if more than one has never been saved,) if I've downloaded several filters in one session, if I've opened one to see how it's made but not saved any changes, and if the filter I'm attempting to download is complex.

However, I can't make it happen consistently, in spite of trying to do so for the last two evenings. (I've downloaded a lot of filters, in that time! )

So I can't give you a reproducible, I'm sorry. But it's happening fairly often. When it does, about 15% of the time the new filter fails to be installed.

This is happening with both Firefox 3.0.7 and Safari 3.2.1. I'm on a 2 X 3 GHz Quad-Core Intel Xeon Mac, with 4 GB 800 MHz ram, running system 10.5.6.