glmer , quasipoisson and standard errors of the coefficients

Thank you all for the answers. I'll be careful with this kind of models 
till I learn how they work...

By the way, I have realized that, comparing a Poisson model  with a 
quasi-Poisson model,  the estimated  SE of the coefficients in the 
quasi-Poisson model are the SE of the Poisson model times the scale 
parameter of the quasi-Poisson model. I guess that this is related with 
Bolker's statement of dividing the LRT by the scale parameter to obtain 
the quasi-likelihood.

Kind regards.

Albert Romero Puente
Departament de Biologia Vegetal-Bot?nica
Universitat de Barcelona
Facultat de Biologia
3a Planta
Av. Diagonal, 645. (08028) Barcelona
Tel. 0034 93 402 14 71