• Inline spell checker optimized: now the performance of inline spell checker similar to the inline spell checker of 5th version
• Numbers are always correct (not misspelled) words now. Previously they were misspelled if SkipWordsWithNumber = false
• changing style of selected FONT html element caused Null reference exception
• call ForceInlineSpellCheck from the event HtmlChanged caused blinking of highlighted words
• Paste function selects pasted text
• Paste function does not preserve line breaks for Plain Simple Text

No public API has been changed comparing the previous version, so replacing the old dll with new dll will work if you are simply upgrading from the previous version.