A couple of thoughts:
* with a little bit of work I can retrieve the relevant version from
the source code repository, build it, and put it up somewhere. In the
meantime you could go to
http://www.math.mcmaster.ca/~bolker/R/src/contrib/ to download version
0.7 (then put it somewhere, setwd() to the appropriate directory, and
install.packages("glmmADMB_0.7.tar.gz",repos=NULL,type="source"))
* a lot of the recent changes in ADMB have to do with tweaks to the TPL
(model definition) file and to ADMB itself that are _supposed_ to make
things more stable in general, but *may* tip a marginally stable model
over the line to unstable -- think of it as a perturbation in a
generally good direction but with some random component ...
* try running with admb.opts=admbControl(shess=FALSE,noinit=FALSE) and
see if that helps at all ...
Ben Bolker
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