a) Disappointment regarding patent granting pratice is often blamed on alledged patent examiner mistakes rather than substantive rules. In most cases the quality of patent examination has nothing to do with patent quality. Patent examiner feel offended by criticism of that kind.
b) As a result of the broadening of patent law scope and weakening of substantive standards patent offices face patent inflation. This problem applies esp. to the US system which admits a severe examination backlog.
Patent Offices respond to this situation with new proposals for a reform of the examination process inspired by the Open Source development model. The idea is to delegate the examination process to market stakeholders.
Newsforge: OSAPA initiative will combat unworthy software patents: "Admittedly, the OSAPA initiative is not a perfect solution, nor is it a complete solution. But it does help solve an identifiable problem with patent quality, and as a result is better than what we have now. Perhaps most promising of all, the initiative has managed to find common ground among stakeholders with interests that are traditionally adverse, and focused attention on a solution, albeit imperfect, that benefits everyone."