Past Changes?

After reading Crossan's book, I think the idea that Christians must adapt the Bible to suit a new era is a very good one.  It also seems as though Jesus interpreted the Old Testament in somewhat nontraditional ways in order to suit the era in which he lived.  Furthermore, this concept of interpreting religious texts appears to have been far more accepted in the past.

Learning all of this has caused me to wonder if Jews who lived prior to Jesus' time actually revised the Old Testament textually.  As new situations arose, it seems as though rewriting outdated sections of the Old Testament would have been very useful for the ancient Jews.  While it may be impossible to prove whether or not such adaptation of text occurred, hypothesising about the possibility is interesting and may help some to understand the flexible and metaphorical nature of the Bible today.