No known upgrade issues going from 1.6.0 to 1.6.1 This only applies if you upgrade from a version <= 1.4.1: About the config file: The changes made it neccessary to force every entry (either MODE{xyz} or FILTER1,FILTER2{REGEX}...) to be in one line. One line per entry is crucial now. If you hand-edited your config file you might experience problems... everyone else shouldn't. There are also two new Filter options: "INVERT" and "CASE_SENSITIVE", see the tutorial, pop-up help for reference This only applies if you upgrade from a version < 1.3.0: About the configuration directory: Since version 1.3.0 the xlogmaster has a subdirectory in $(prefix)/etc called "xlogmaster", so files that were under $(prefix)/etc before are now under $(prefix)/etc/xlogmaster. This means that during installation nothing will get lost, but the old files are not being used anymore - you should delete them or move them into the new directory. About the config file: The changes to version 1.3.1 made it neccessary to give the config file format a slight change. All older versions are understood and should be read fine, but you won't be able to read new config files with a version < 1.3.1.