I did an advanced author search (for "Jr") which resulted in more than 100 records. The first page had a "Merge Selected Records" button, but when I went on to records 100-199, that button disappeared. This does not appear to happen with Title searches.
Anonymous
edit/aa_search.py 1.18 committed.
Fixed in edit/aa_search.py, installed in r2013-64 on 2013-03-12.