lprngtool broken as of today on SID

[Uwe Dippel <udippel@uniten.edu.my>]

There was a major upgrade today of lprngtool and since then it wouldn't
start:
# lprngtool
Xlib: connection to ":0.0" refused by server
Xlib: No protocol specified
 
Application initialization failed: this isn't a Tk applicationcouldn't connect to display ":0.0"
Error in startup script: invalid command name "frame"
    while executing
"frame .menuf -relief raised -borderwidth 1"
    (file "/usr/bin/lprngtool" line 1530)

Is this a porting problem or an lprngtool-problem ?

(Or eventually *my* mistake !?)