Applying new highlighting to a selected word or phrase (any highlighting, including using a user-defined palette) takes up to 10-15 seconds to actually appear (sometimes longer). From the time that I press a shortcut key to apply said highlighting till it actually appears the CPUs (all 4 cores) pretty much max out. Not sure what causes such CPU activity to add a small bit of highlighting, but it does make marking up while I read a touch difficult... :-)