new version of lme4 - Log-Likelihood of model returned as "-Inf"

Hi All,

I was working with Poisson glmms in lme4 last year in 2013 using  
Windows XP, lme4 version 0.999375-16 (2008-06-23) and R version  
2.15.1 (2012-06-22), evaluating a set of candidate models with AIC  
to select the best ones.

This worked well until I updated lme4 and R last month.

I now updated to R version 3.0.2 (2013-09-25) -- "Frisbee Sailing"  
and lme4 version 1.0-5 (2013-10-24), still Windows XP, and am  
running the same models again on the same data, and lme4 now returns  
"-Inf" for the log likelihood, so it can't calculate AIC.

Using the previous versions, I got stable values for Log-Likelihoods  
and calculated AICs with them.

Attached is a sample of the dataset and the code I am using.

How can I get a Log-Likelihood estimate with the current versions of  
lme4 and R?

Thanks in advance.
Justin Baldwin

Hampshire College, MA, USA