Created attachment 58545 [details] the file causing the hang And ODT with this fragment, hangs swriter: <text:section text:name="section" text:display="none"> </text:section>
Thanks for bugreport not reproduced hang in 3.3.4 and 3.5.4 on Fedora 64 bit and in 3.5.2 on Windows 7 32 bit (document opens correctly) msWord 2007 also not hangs, bug can not open this document
Checked with: LO 3.5.5.3 Build ID: own W7 debug build Windows 7 Professional SP1 64 bit Could not reproduce.