Overviewer POI issues

overviewer-config.py

# Marker definitions
def homeFilter(poi):
        "Homes"
        return poi[id] == 'Sign' and (\
                '.' in poi['Text1'])

def signFilter(poi):
        "All signs"
        return poi['id'] == 'Sign'


worlds["My world"] = "/stripe//minecraft/worlds/world/world"

renders["normalrender"] = {
    "world": "My world",
    "title": "Daytime",
    "rendermode": smooth_lighting,
    "markers": [signFilter, homeFilter],
}

renders["Nighttime"] = {
    "world": "My world",
    "title": "Nighttime",
    "rendermode": smooth_night,
}

# Commented out since no one has gone to the nether
#renders["nether"] = {
#    "world": "My world",
#    "title": "Nether",
#    "rendermode": nether_smooth_lighting,
#    "dimension": "nether",
#}

texturepath = "/stripe/minecraft/"
outputdir = "/var/www/minecraft"

Running Overviewer complied from #ff0f4fe

> /usr/local/bin/overviewer.py --version
Minecraft Overviewer 0.9.58 (ff0f4fe)
built on Sun Mar 18 12:35:24 2012

From the log:

Found the following render thing: OrderedDict([('imgformat', 'png'),
('imgquality', 95), ('title', 'Daytime'), ('rerenderprob', 0.0), ('bgcolor',
(26, 26, 26, 0)), ('optimizeimg', False), ('world',
'/stripe/minecraft/worlds/world/world'), ('northdirection', 0), ('rendermode',
[<overviewer_core.rendermodes.Base object at 0x11a8a50>,
<overviewer_core.rendermodes.EdgeLines object at 0x11a8a90>,
<overviewer_core.rendermodes.SmoothLighting object at 0x11a8ad0>]), ('markers',
[<function signFilter at 0x1280c08>, <function homeFilter at 0x1217ed8>]),
('dimension', 'default'), ('texturepath', '/stripe/minecraft/'),
('worldname_orig', 'My world')])

So it's definitely seeing my filters. I'm assuming I've written an error in my filter or in the way I've specified them in the "markers" line.