The new features in LyX 2.0 are detailed in
http://wiki.lyx.org/LyX/NewInLyX20
+* Advanced Search Facility
+* Spell-checking on the Fly
+* Compare Documents Feature
+* XHTML Output
+* Multilingual Thesaurus
+* XeTeX Backend
+* Multiple Indices Support
+* Progress View and Debugging Pane
+* Enhanced Instant Preview
+* Forward Search for DVI/PDF Files
+* Enhanced Version Control Features
+
+
+What's new in version 1.6.8?
+-----------------------------
+
+LyX 1.6.8 is the result of our ongoing efforts to make our stable version
+even more reliable and stable. We have fixed crashes that have been
+reported to us, ironed out many small glitches, further polished the user
+interface, updated the documentation and added some new layouts.
+
+
+What's new in version 1.6.7?
+-----------------------------
+
+From the list of fixes and improvements, we'd like to highlight
+particularly that this release irons out all known stability problems with
+Qt 4.6. LyX 1.6.7 is our first release that is supposed to run smoothly
+with Qt 4.6, so we urge all distributors who use that version to upgrade
+LyX as well.
+
+
+What's new in version 1.6.6.1?
+------------------------------
+
+The sole purpose of this release is to fix one glitch that was introduced
+by LyX 1.6.6: The spellchecker missed further misspellings after applying
+a correction. This was due to the fix to different bug that had to be
+reverted. In any other respect, this release is identical to Lyx 1.6.6.
+
+
+What's new in version 1.6.6?
+-----------------------------
+
+The release features a long list of fixes and improvements. Yet a number
+of crashes, reported by our users or our automatic stability testing
+program, were fixed. Moreover, LyX was improved in many details. It also
+introduces new features, such as support for the enchant spell checking
+backend and for aspell language varieties (such as old and new German
+spelling in parallel).
+
What's new in version 1.6.5?
-----------------------------
The new features in LyX 1.6 are detailed in
http://wiki.lyx.org/LyX/NewInLyX16
+* Multiple Work Areas
+* Split Views
+* User-formattable Collapsable Insets
+* Layout Modules
+* Layout combobox changes
+* Support for the LaTeX package hyperref
+* Support for hyperlinks and URLs
+* Improved floats
+* New implementation of math macros
+* Completion popup
+* Inset Tooltip
+* Context Menu
+* Symbols dialog
+* Shortcut Configuration dialog
+* Paste Graphics from the Clipboard
+* "Visual mode" for bidirectional cursor movement
+* Fullscreen mode
+* Extended Outliner
+* Session management
+* Subversion support
+* Graphics parameters groups
+* LyX functions manual
+* Multi-LFUN Keybindings
+
What's new in version 1.5.7?
----------------------------