Only the most important changes more recent than version 0.6 are noted here.
+Version 1.5.2:
+ Added a new experimental LZX compressor which can be enabled by passing
+ '--compress-slow' to `wimlib-imagex capture' or `wimlib-imagex
+ optimize'. (The latter is only applicable if the WIM is already
+ LZX-compressed and the '--recompress' option is also given.) The
+ experimental compressor is much slower but compresses the data slightly
+ more --- currently usually to within a fraction of a percent of the
+ results from WIMGAPI/ImageX.
+
+ A workaround has been added for compatibility with versions of WinPE
+ that interpret alternate data stream entries in the boot WIM
+ incorrectly.
+
+ An alignment bug that caused a crash in the LZX decompressor on some
+ builds was fixed.
+
+ wimlib now attempts to clear the WIM_HDR_FLAG_WRITE_IN_PROGRESS flag in
+ the WIM header when restoring the previous state of a WIM it failed to
+ successfully update.
+
+ Added a workaround to avoid an access denied error on Windows when
+ replacing a WIM file that another process has opened.
+
Version 1.5.1:
wimlib can now open WinPE WIMs from WAIK v2.1, which had a quirk that
needed to be handled.