The following should help most casual users of the project update their applications:

• All filters are now loaded via FilterToBeanProxy. The FilterToBeanProxy obtains the filter from a Spring application context via the WebApplicationContextUtils.getApplicationContext() method. Refer to the reference documentation to see the new configuration of filters.
• SecurityEnforcementFilter now requires an AuthenticationEntryPoint and PortResolver. Refer to the reference documentation to see the alternatives AuthenticationEntryPoint implementations available. Simply use the PortResolverImpl for the PortResolver requirement.
• Any of your login or login failure pages that previously referred to AuthenticationProcessingFilter.ACEGI_SECURITY_LAST_EXCEPTION_KEY should now use net.sf.acegisecurity.ui.AbstractProcessingFilter.ACEGI_SECURITY_LAST_EXCEPTION_KEY.
• DaoAuthenticationProvider no longer provides setters for case sensitivity handling. The respective AuthenticationDao implementations should decide whether or not to return User instances reflecting the exact case of the requested username. The new PlaintextPasswordEncoder offers a setter for ignoring the password case (defaults to require exact case matches).
• DaoAuthenticationProvider now provides caching. Successful authentications return DaoAuthenticationTokens. You must set the mandatory "key" property on DaoAuthenticationProvider so these tokens can be validated. You may also wish to change the "refreshTokenInterval" property from the default of 60,000 milliseconds.
• If you're using container adapters, please refer to the reference documentation as additional JARs are now required in your container classloader.
• Whilst not really a change needed to your program, if you're using Acegi Security please consider joining the acegisecurity-developer mailing list. This is currently the best way to keep informed about the project's status and provide feedback in design discussions. You can join at https://lists.sourceforge.net/lists/listinfo/acegisecurity-developer. Please continue using the Spring Users mailing list for general support.

There are also lots of new features you might wish to consider for your projects. These include CAS integration, pluggable password encoders (such as MD5 and SHA), along with pluggable salt sources. We hope you find the new features useful in your projects.