Thanks to Jacobo (commit 55211e612d2cbed03dd81c039d07ea4e936c2804 and 6820dec8903b182260340c638c35b5a5ca207a85) SDT-blocks are now preserved during roundtrip.
Just to not lose this bug I report it already (maybe to early :)?)
* Download attachment of bug 74775 (attachment 93745 [details])
* Open it using Writer
* Resave it as .docx
Open both documents in MS Word
* Select the citation in the sentence
* In the original file, there is only a SDT-block around citation (Kramer & Chen, 2006) in the first paragraph.
* In the roundtripped file there is a SDT-block around the whole paragraph (1 sentence in this case)
Tested using Windows 8.1 with LibreOffice Version: 188.8.131.52.alpha0+
Build ID: 87efec9cc27b18aa09e50c289b503ba1127eb0b8
TinderBox: Win-x86@39, Branch:master, Time: 2014-03-18_02:50:50
Created attachment 96014 [details]
Selected SDT-block in the original .docx file
Created attachment 96015 [details]
Selected SDT-block in roundtripped file
@Jacobo: First of all, _THANKS_ for _ALL_ your work :-)! Really appreciated.
I hope I don't scare you away with reporting this bug already. I only did report it for not forget about it/keep track of it.
Jorendc: I appreciate the testing :) . I'm taking this.
It happens the same with the checkbox sdt control I've just implemented, fixing that too.
Jacobo Aragunde Perez committed a patch related to this issue.
It has been pushed to "master":
fdo#76327: only enclose the checkbox in the sdt block.
The patch should be included in the daily builds available at
http://dev-builds.libreoffice.org/daily/ in the next 24-48 hours. More
information about daily builds can be found at:
Affected users are encouraged to test the fix and report feedback.
So as far I can see this is fixed by miklos' patch
http://cgit.freedesktop.org/libreoffice/core/commit/?id=b2bc4ea8ddae6b01f344469d988e21fed3143c42 : DOCX import: handle SDT around citation field
Lets mark it as RESOLVED FIXED for now :-).