mm_forum

I do not get what you are talking about. Sorry.
Do you speak of the messageing or of the forum category? Or any other?

In the list of threads when you click the message header and should see the message with replies there should be the sender and time info + message text + signature -> but here there is only sender and time info, no message text (nor signature I now realize).

I assume that you use your own template files. Try using the default ones of the forum, not yours. If it works then, your templates must be updated according to the changed markers. Just a guess, I have not checked it. Give it a try and let me know if it helps.

No, I haven't changed any templates. I can send you a link if you want to check.

Strangest thing - now that I updated back to 1.9.2 (I had downgraded meanwhile to 1.9.1) the messages are now there!
I don't know what happened. I also updated the t3jquerey and some other extensions.

okay, I got so curious I installed to another site, TYPO3 4.5.16, the same thing there. Except that downgrading and then upgrading didn't help.

Have you saved the settings of the plugin and cleared your cache after downgrading and upgrading? Something has to be different. Perhaps it is any change between TYPO3 4.5 and 4.7 as you mentioned different versions.

Sadly I do not have the time to test it by myself. Maybe somebody else will do it. Feel free to test it yourself and get to know what the difference is, what the problem causes. It would be a great help. Thanks.

The problem is related to the function marker_getPosttextMarkerfile in class.tx_mmforum_postfunctions.php. It checks if $tstamp is larger than $cache_tstamp. Else it assigns set $posttext = $cache_text. The problem occurs when (as in my case) $cache_text is empty in the database.

Hope this helps

Tomas