Can't use string ("b007cf0r") as a HASH ref...

[seanh]

Anyone know why I get this error, or how I can avoid it?

Can't use string ("b007cf0r") as a HASH ref while "strict refs" in use
at scripts/get_iplayer line 1554.

Line 1554 is:

    # Only write entries for correct prog type
    if ( $this->{type} eq $prog_type ) {

I'm using get_iplayer version 2.78.

I get the error on one computer, but when I run the same version of
get_iplayer with the same config on another computer I don't seem to
get the error.