It seems like the new version of the JiraIssues macro in version 2.10 doesn't correctly render the table of issues. Even though the table itself takes the width of its surrounding element (eg. a table with a defined width), the vertical space it occupies is as wide as the sum of the width of all the columns.

We have temporarily fixed the issue by adding the renderMode=static.

See attachmement for a screen snapshot of the issue, with some additional information.