Hi James, I can't find similar reports regarding tapatalk, and don't use it myself (crappy company blackberry), but maybe we can test a couple of things. In the next couple of days I'll update the tapatalk scripts, just in case, then see if there is any change.
Do you get emails when you receive a PM?
Anyone else noticing PMs not showing on the right menu, despite having not read them? If so, do you use tapatalk?
But yes, regarding Will's quesiton, it might well affect the "view new items" list, if a login via tapatalk basically resets this as a last visit, so when you come in via a regular browser, and log in again, it only shows new posts since your last login, which may have been via tapatalk.