According to the e-mail, the software currently does not support the syncing of any new notes, text messages, or call history, because none of these can be imported into SMS Log, Call Log, or Mark/Space Notebook.
Mark/Space is working on a compatibility update that will be available free of charge by the end of June. A beta version will be available for testing some time on June 17 and available for download at Mark/Space's Web site.
Mark/Space did not indicate (and we could not verify) whether or not you should temporarily disable the application until a fix is available. Attempts to reach the company at press time by phone were not successful.
Are you experiencing problems with this application or other applications that interface with your iPhone on your Mac or PC? Let us know in the comments.