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    <body><span class="vcard"><a class="email" href="mailto:lajo@rn.dk" title="Lars Jødal <lajo@rn.dk>"> <span class="fn">Lars Jødal</span></a>
</span> changed
          <a class="bz_bug_link 
          bz_status_NEW "
   title="NEW - Behavior is not consistent when saving with unknown file extension"
   href="https://bugs.documentfoundation.org/show_bug.cgi?id=111071">bug 111071</a>
          <br>
             <table border="1" cellspacing="0" cellpadding="8">
          <tr>
            <th>What</th>
            <th>Removed</th>
            <th>Added</th>
          </tr>

         <tr>
           <td style="text-align:right;">Ever confirmed</td>
           <td>
                
           </td>
           <td>1
           </td>
         </tr>

         <tr>
           <td style="text-align:right;">Status</td>
           <td>UNCONFIRMED
           </td>
           <td>NEW
           </td>
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         <tr>
           <td style="text-align:right;">CC</td>
           <td>
                
           </td>
           <td>lajo@rn.dk
           </td>
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      <p>
        <div>
            <b><a class="bz_bug_link 
          bz_status_NEW "
   title="NEW - Behavior is not consistent when saving with unknown file extension"
   href="https://bugs.documentfoundation.org/show_bug.cgi?id=111071#c12">Comment # 12</a>
              on <a class="bz_bug_link 
          bz_status_NEW "
   title="NEW - Behavior is not consistent when saving with unknown file extension"
   href="https://bugs.documentfoundation.org/show_bug.cgi?id=111071">bug 111071</a>
              from <span class="vcard"><a class="email" href="mailto:lajo@rn.dk" title="Lars Jødal <lajo@rn.dk>"> <span class="fn">Lars Jødal</span></a>
</span></b>
        <pre>I can confirm the behaviour with current fresh version:

Version: 6.1.4.2 (x64)
Build ID: 9d0f32d1f0b509096fd65e0d4bec26ddd1938fd3
CPU tråde: 4; Styresystem: Windows 10.0; Gengiver af brugergrænseflade: GL; 
Lokalisering: da-DK (da_DK); Calc: group threaded

and also with a quite recent master version:

Version: 6.3.0.0.alpha0+ (x64)
Build ID: 3c964980da07892a02d5ac721d80558c459532d0
CPU threads: 4; OS: Windows 10.0; UI render: default; VCL: win; 
TinderBox: Win-x86_64@42, Branch:master, Time: 2018-12-12_03:38:09
Locale: da-DK (da_DK); UI-Language: en-US
Calc: threaded

I also agree that this should be considered a bug, not a feature: 

a) "Automatic file name extension" is checked and file type is chosen (e.g.
"ODF Text Document (*.odt)" or "Word 2007-2019 (*.docx)"). But yet, Writer
tries to save the file as a file of type .12 instead of the chosen filetype.

b) As Aron's headline says, behaviour is not consistent. If no file "abcd.12"
exists, then saving with the exact same settings saves the file as
"abcd.12.odt". Thus, ".odt" is added in the normal case, but not if the file
"abcd.12" already exists. I agree with <a href="show_bug.cgi?id=111071#c2">comment #2</a> about expected behaviour.</pre>
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