When the save is sent and then you try to close the document, does it warn that the document needs saved or does it close without the save or dialog warning that there has not been a save? 

Also - any repro steps that are consistent here?

This is relevant only to the LibreOffice OnLine, does not affect the desktop app.  Might be good to actually create a new component in the bugzilla - LibreOffice OnLine - what do you think?  Can you please create one? :-)

As to the reproduction steps: Open a testing .odp in the LOOL Impress, mark something, make it bold, press save; and in the server logs, you get only:

9556,56,1438801819712,ToClient,Input,'uno .uno:Save'
9556,56,1438801819712,ToClient,forwardToPeer,'uno .uno:Save'
9608,1,1438801819712,ToMaster,Input,'uno .uno:Save'

I added LibreOffice online - I'll need to deal with versions at some point but for now it's just "unspecified"

Joel: Thanks so much!  For the versions, I'm OK with using the git hashes in the reports for now, no problem with 'unspecified'.  Regarding the Components - can you please remove 'Base', and the 'Spreadsheet' is maybe should be changed to 'Calc'?

Done :)

https://gerrit.libreoffice.org/gitweb?p=core.git;a=commitdiff;h=e5ba9090f4809906ffa1c1dea352161cb988b97f

Adolfo: Thanks for adding here the reference! :-)

Unfortunately we still cannot close as it, as there is 2nd part to that; Mihai told me that sometimes the tiles are moved from the editing cache to the persistent one at the wrong time, making them look wrong the next time they are used / loaded.

Setting as fixed.  We need to improve the save notification mechanism a bit, but that should be treated separately.