Two things:

1) Are the permissions on entry.db correct? Should be 666.

2) Has your host recently upgraded DB_File or Berkeley DB?

I suddenly started getting this error when I tried to post a new entry to my journal...

error:  Saving entry failed: Tie '/home/kitykity/www/kitylog/db/entry.db' failed: File exists

And now all my entries are gone!  What do I do?  Somebody, please help me!  My journal is at http://www.kitykity.com/kitylog/main .  Thank you!