With 2017-11-03 TB42 64-bit Windows build, getting a save error with Writer documents. "Write Error. Error in writing sub-document styles.xml" Build has no issue saving from Calc, Impress, Draw or Formula editor. Just from Writer with error as above.
When in Writer module and document attempts autosave -- UI goes unresponsive and status bar flickers with a repeating Saving action. =-testing-= On Windows 10 Home 64-bit en-US with Version: 6.0.0.0.alpha1+ (x64) Build ID: 8c374022790b54834fa54615e1953c8ee30641a8 CPU threads: 4; OS: Windows 10.0; UI render: GL; TinderBox: Win-x86_64@42, Branch:master, Time: 2017-11-03_01:58:27 Locale: en-US (en_US); Calc: group
*** This bug has been marked as a duplicate of bug 113623 ***