I just purchased back issues of the society journal for 1993 and 1994. 1993 were staple bound and 1994 perfect bound. The adhesive used on all four issues from 1994 seems to have become brittle with age and the pages pop right out when the book is opened. As far as I can ascertain subsequent issues [and I have most of them] do not have this problem. Has anyone else experienced this problem, or did I just receive issues that were poorly stored, or ?