Summary

The table's border become invisible after export to a word file, this issue however does not affect Open Office, it only affects user with Microsoft Office. Thus, Open office can be used as a workaround. (Unfortunately, the generated files generally don't open correctly in editors other than MS Office, check this: https://jira.atlassian.com/browse/CONF-26113).

There's a similar bug for PDF exports:
https://jira.atlassian.com/browse/CONF-34390

Steps to Reproduce

Here is the reproduction procedure:

1. Add a table with wide columns to a new page then save it. (original.png)
2. Export the page to the a word file.
3. On the word file

Expected Results

The table fits the file correctly.

Actual Results

The border of the table become invisible. (export+to+word.doc)

Workaround

Partial workaround

1. Use workaround here to export a PDF file that shows that table correctly
2. Export as PDF
3. Use some PDF to Word converter, like this one