lmer: no warning messages in dev version

Hi,
When I use the stable CRAN version for parametric bootstrap I often get 
warnings messages (e.g. false convergence and "singular convergence") 
for some runs. Happily I installed the gitHub version that can catch 
these warnings. However, to my surprise I dont get any warnings with 
this version. My guess is that most warnings before were associated with 
variances=0, and that the new version doesnt give a warning about that. 
Is this a likely explanation?

Gustaf

Gustaf Granath (PhD)
Post doc
McMaster University
School of Geography & Earth Sciences