I wonder if there's a problem with glht and the current version of lmer
 From http://epub.ub.uni-muenchen.de/2120/1/tr019.pdf :

require(multcomp)
require(lme4)
data(trees513)
mmod <- lmer(damage ~ species - 1 + (1 | plot) + (1 | lattice), data =  
trees513, family = binomial())
K <- diag(length(fixef(mmod)))
(ci <- confint(glht(mmod, linfct = K)))

	 Simultaneous Confidence Intervals

Fit: Error in x$model$call : $ operator not defined for this S4 class
_____________________________
Professor Michael Kubovy
University of Virginia
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