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            <b><a class="bz_bug_link 
          bz_status_NEW "
   title="NEW - Tab spreadsheets selected Shift+Ctrl+PgDn not marked"
   href="https://bugs.documentfoundation.org/show_bug.cgi?id=123269#c7">Comment # 7</a>
              on <a class="bz_bug_link 
          bz_status_NEW "
   title="NEW - Tab spreadsheets selected Shift+Ctrl+PgDn not marked"
   href="https://bugs.documentfoundation.org/show_bug.cgi?id=123269">bug 123269</a>
              from <span class="vcard"><a class="email" href="mailto:m.weghorn@posteo.de" title="Michael Weghorn <m.weghorn@posteo.de>"> <span class="fn">Michael Weghorn</span></a>
</span></b>
        <pre>Created <span class=""><a href="http://bugs.documentfoundation.org/attachment.cgi?id=150217" name="attach_150217" title="Screenshot with gtk3">attachment 150217</a> <a href="http://bugs.documentfoundation.org/attachment.cgi?id=150217&action=edit" title="Screenshot with gtk3">[details]</a></span>
Screenshot with gtk3

Yes, I can reproduce using

Version: 6.3.0.0.alpha0+
Build ID: 601cc06187d20355810666547225549984b0caa4
CPU threads: 4; OS: Linux 4.19; UI render: default; VCL: kde5; 
Locale: en-GB (en_GB.UTF-8); UI-Language: en-US
Calc: threaded

but in my case it's pretty much the same with

Version: 6.3.0.0.alpha0+
Build ID: 601cc06187d20355810666547225549984b0caa4
CPU threads: 4; OS: Linux 4.19; UI render: default; VCL: gtk3; 
Locale: en-GB (en_GB.UTF-8); UI-Language: en-US
Calc: threaded

s. attached screenshot for the gtk3 case ("Sheet2" and "Sheet3" are marked)</pre>
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