The first PDF attached has the behavior discussed in this bug (borders not displayed in print preview if the browser is not maximized). The other PDF does not show table borders even if the browser is maximized. The second PDF will be rendered obsolete here and reattached to bug 1720896.
Bug 1720896 Comment 9 Edit History
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The first PDF attached has the behavior discussed in this bug (borders not displayed in print preview if the browser is not maximized). The other PDF does not show table borders even if the browser is maximized. The second PDF will be rendered obsolete here and reattached to bug 1723806.