hopeful- Thank you for your report. This is occurring because the style you're using is unable to render your entry preview in your journal style. LiveJournal developers will be working to resolve this problem as soon as possible.
- In the meantime, you may wish to switch to a different layout (as described in http://www.livejournal.com/support/faqbrowse.bml?faqid=170) or enable "simple" comment pages (through the customization wizards at http://www.livejournal.com/customize/) until this is resolved. I apologize for the inconvenience.