On his blog, Byron Jones explains
the new features of Bugzilla 4.2, focusing on the revisions to search functionality: "a major change between bugzilla 4.0 and bugzilla 4.2 comes in the form of changes to searching. the searching implementation in 4.2 was rewritten from scratch, removing some seriously convoluted code and adding a large amount of test cases.
" The changes include search result limiting, changes to relative time operators, and more consistent complex queries.
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