The claimed advantages of object-orien ted frameworks are, among others, increased reusability and reduced time to market for applications. Although several examples have shown these advantages to exist, there are problems and hindrances associated with frameworks that may not appear before their usage in real projects. In this paper a num ber of problems related to frameworks are described organised according to four categories, ie framework dev elopment, usage, composition and maintenance. For each category, the most relevant problems and experiences are presented.