"The Gingerbread Man is the first thriller I've ever done!"  Robert Altman
In 1955 Charles Laughton directed "The Night of the Hunter", a spooky slice of Southern Gothic in which Robert Mitchum plays a scary serial killer. One of the film's more famous sequences consists of two kids escaping from Mitchum on a rowboat, the kids frantically paddling whilst Mitchum wades after them like a monster.
Seven years later Mitchum played an equally spooky killer in "Cape Fear", another film set in the American South. That film featured a local attorney trying to protect his family and likewise ended with Mitchum terrorising folks on a boat. In 1991 Martin Scorsese, trying to branch out and tackle something more mainstream, remade "Cape Fear", boat scene and all.
Now we have Robert Altman's "The Gingerbread Man", another slice of small town Southern Gothic. Altman says he consulted "The Night of the Hunter" for inspiration and tackled such a mainstream film purely because he wanted to "spread his wings and try a popcorn picture", but what he's secretly attempting to do here is deconstruct the canonical films of the Southern Gothic genre.
So instead of a showdown on small boat, we get a showdown on a giant ship. Instead of two kids being kidnapped, we get two kids being safely returned to the police. Instead of money being hidden, we have money being readily given via a last will and testament. Instead of the righteous attorney of the 1961 film and the deplorable attorney of the 1991 remake, we get a rather three-dimensional lawyer in Kenneth Branagh. Instead of the monster chasing the family we get the hero chasing the bad guys. Instead of the monster breaking into the family's house boat, we have the hero hunting the monster on board the monster's "house ship". Similarly, instead of a murderous serial killer we get an innocent weirdo played by Robert Duvall. . .etc etc etc.
Altman goes on and on, reversing everything just a little slightly, pulling at the edges and doing his own thing. His touch is most apparent during the film's first half-hour, the film existing in an uneasy space between conventional plot-driven movie storytelling and Altman's fondness for overlapping dialogue, casual narratives, prowling camera movement and the way that characters aren't so much introduced as they are simply part of what's going on.
Still, despite Altman's best intentions, the film never rises above mediocrity. Altman's too bound to the conventions of the "thriller format" to do much damage, his style is too lethargic to generate tension and the film is simply not radical enough to counterpoint other canonical films in the genre. "Gingerbread Man" is thus too mainstream to work as a more pure Altman film and too Altman to work as a mainstream thriller.
The film's not a complete waste, though. Robert Downey Junior, Kenneth Branagh and the usually intolerable Daryl Hannah, all turn in juicy performances. The film also has a nice atmosphere, set against a approaching hurricane, and the final act contains some interesting twists and turns. While it's not the complete disaster that Scorsese's "Cape Fear" was, the film still never amounts to anything special.
7/10  In the late 90s Altman made 3 successive films set in the American South: "Kansas City", "Gingerbread Man" and "Cookie's Fortune". Unlike "Gingerbread Man", both "Kansas City" and "Cookie's Fortune" tackle the genre on the broader, more looser canvases that Altman was most comfortable with.
"Kansas City" is the more important of these two films, its hierarchies of class, politics and crime, and its desire to break radically away from typical gangster genre frameworks, would prove influential on all serious 21st century film crime writers (see, for example, "The Wire"). That said, "Cookie's Fortune", while a much slighter tale, is perhaps the better picture.
Note: Altman claims that this is his first thriller, but he directed "Images", an art house thriller, in 1972.
Worth one viewing.

I believe in keeping religion out of government and out of the movies. When I want a sermon, I'll go to church, but I don't want one from a movie. I don't mind some supernatural themes, (after all, religion is about as supernatural as you can get!) but this movie had so much preaching in it that I was really annoyed. The landlady reminded me of witches that of seen in other movies. The bad guy even looked like he had horns.
And what a silly ending: the hero went into the meeting and yelled at all of those old men, and that broke the spell. If only life were that simple. I think that when movies are that stupid, they ought to be distributed with a warning: DANGER! PREACHING CONTAINED HEREIN!