Weibull distribution in JAGS (dweib() in bugs module) is defined in terms of shape and rate parameters. JAGS manual 3.4.0 states that there is dweibull() alias that is compatible with R. This is confusing, because in R (at least 3.0+) dweibull() is defined in terms of shape and scale parameters, and one would expect that in JAGS dweibull() is shape/scale as well. But this is not the case.
If it's not possible to make dweibull() really use shape/scale parametrization, maybe this alias could be removed, as it would force the user to take a second look at the parameters. At the very least the manual should not state R compatibility.