I agree with the previous message and went to "the other place" (IMDb) to see if there are any other weird claims about the film.
After 90 minutes of clicking and swearing, I managed to access the Withnail messageboard and there are masses of messages, some of them mad and probably written by Film Studies students. My attempt to register with IMDb and add my own comments wasted another half-hour and ultimately failed, so my loyalty to Mr Crooked's Emporium is unabated.
Before I got flung off the IMDb board (and couldn't find my way back again) read an interesting thread about gay-ness in the film. Where do we stand on that topic, gentlemen (and Miss McFuck)?