Steve wrote:
I thought it was the other way round - leaded solder is ok with all
component types but lead free solder shouldn't be used with components
where the leads have lead in the plating. All the manufacturers I've
checked with say leaded solder is ok with RoHS compliant parts.

From a compliance point of view, you can't mix either type, either way
around. If you use leaded solder to assemble (or repair) an RoHS
compliant device, it won't be RoHS compliant.