Problem description: 
RTF groups, denoted by enclosing curly brackets, are supposed to stack the current character/ruler state and restore it after the closing bracket. If the previous state included tab settings, LibreOffice fails to delete tabs set within the brackets, leading to column misalignment.

Steps to reproduce:
1. This small RTF file displays the problem:
{\rtf1\ansi
{\fonttbl \f0\froman Times;}
\deftab31680
\pard\tx1440\plain\ql\f0\fs40
{\tx360\tx720\tx1080\tab\tab\tab\tab This is line one.\
}{\tx480\tx960\tab\tab\tab This is line two.\
}{\tx720\tab\tab This is line three.\
}{\tab This is line four.\
\tab All these lines should start one inch from the left margin.\
}}

2. This similar file doesn't, as it has no tabs set outside the groups:
{\rtf1\ansi
{\fonttbl \f0\froman Times;}
\deftab31680
\pard\plain\ql\f0\fs40
{\tx360\tx720\tx1080\tx1440\tab\tab\tab\tab This is line one.\
}{\tx480\tx960\tx1440\tab\tab\tab This is line two.\
}{\tx720\tx1440\tab\tab This is line three.\
}{\tx1440\tab This is line four.\
\tab All these lines should start one inch from the left margin.\
}}

Current behavior:
The first file shows misaligned lines; the second doesn't.

Expected behavior:
Both files should display like the second file, as they do in Microsoft Word, (Mac) TextEdit, Nisus Writer, and other RTF readers.

It's a somewhat obscure bug. I hope the fix is easy.


              
Operating System: Mac OS X
Version: 4.2.1.1 release