Portupgrade troubles, interactive ports

[SIMON TIMMS]

Hi there,
I use to run portupgrade and when it ran into an interactive port (like php) it would sit and wait for my input before continuing.  This worked fine and I didn't mind having to keep a bit of an eye on portupgrade.  However now when I run portupgrade (portupgrade -ra) it stalls when it runs into an interactive port.  I can't enter any input and ctrl-C/ctrl-z do nothing.  I end up killing the process from another terminal.  I have tried this over ssh and also from the console.  

I am currently running 5.2 release.

I am sorry if this has been answered before but I didn't see mention of it in the archives or in other reference sources.

Thanks, Simon