I've narrowed down the problem to repro when I call 'svn diff MissingPunctuation' from a directory that itself is called MissingPunctuation:
C:\[start of my path]\MissingPunctuation>svn diff missingPunctuation\ > \nul svn: E235000: In file '..\..\..\subversion\libsvn_wc\wc_db.c' line 9465: assertion failed (work_presence == svn_wc__db_status_normal || work_presence == svn_wc__db_status_not_present || work_presence == svn_wc__db_status_base_deleted) I've deleted and retrieved through 'svn update' the offending directory to no effect. (Update worked. Diff still doesn't.) I haven't tried adding another path of the form [pathStart]/X/X/ to see if that repros the issue, but there's strong suspicion the name repetition is a factor. Thanks, John