Created attachment 117072 [details]
File Demonstrating Problem

ubuntu 15.04
LibreOffice 5.1 Alpha

Steps:
1. Open writer;
2. Write a word;
3. Insert a footnote
4. Highlight the word and push ctrl + 1

Observed: Heading style 1 applied

Insert TOC:

5. Insert -> Table of Contents and Indexes -> Table of Contents and Indexes -> Ok on dialog

Observed: The "1" from the footnote number is included in the TOC entry

Expected: The "1" is not included as it is not part of the title of the heading

Notes:
This is a regression (not present in 3.3);
Bibisect effort would be appreciated;

Setting to:
Minor -> Can slow down but won't prevent high quality work (you can manually edit the ToC but you have to do it *each time* the ToC is updated;
High -> Regression