We have a newish install of MSM (3.18.5) and in the External Tools Configuration have added the path for HTML Tidy and installed the necessary spell checker language. Everything in this screen reports that HTML Tidy is enabled and available. When we then add content the HTML Tidy flag is greyed out and mousing over it says the status is disabled.
Also, looking in Global Preferences under WYSIWYG Plugins, the 'tick box' for HTML Tidy is greyed out (and unticked) with a message that it is disabled.
Is there an extra step to enable it that we haven't found?
We have a similar issue (3.18.6). What OS are you on? I think the problem is related to our Suse OS - I was waiting on the purchase of a support pack to figure this one out, but would rather get the solution from these forums 
[quote]We have a newish install of MSM (3.18.5) and in the External Tools Configuration have added the path for HTML Tidy and installed the necessary spell checker language. Everything in this screen reports that HTML Tidy is enabled and available. When we then add content the HTML Tidy flag is greyed out and mousing over it says the status is disabled.
Also, looking in Global Preferences under WYSIWYG Plugins, the 'tick box' for HTML Tidy is greyed out (and unticked) with a message that it is disabled.
Is there an extra step to enable it that we haven't found?[/quote]
Please note that from our 3.18.5 release that the HTML Tidy binary is used instead of the LibTidy PHP library. If upgrading from a previous 3.18.x release, this would be the likely cause. If this is the case, please ensure that the binary is installed and verify the HTML Tidy path in "External Tools Configuration".
If this doesn't bring about a resolution please let us know. If the system was upgraded, please include the previous version number in your reply.
We are running Solaris 10 with PostgreSQL db so I don't think that can be the problem. I'm waiting on our infrastructure guy checking the install before replying to Mark.
I’ve just filed a bug for this: http://bugs.matrix.squiz.net/view_bug.php?bug_id=3306
It appears as though Matrix 3.18.5 and later still does a check for the presence of the PHP5 tidy module, and disables HTML Tidy if it is not installed (even though it does not use that anymore).
Until the bug is fixed, the workaround would be to install the PHP5-tidy module.
Cheers 
Dan.
[quote]I’ve just filed a bug for this: http://bugs.matrix.squiz.net/view_bug.php?bug_id=3306
It appears as though Matrix 3.18.5 and later still does a check for the presence of the PHP5 tidy module, and disables HTML Tidy if it is not installed (even though it does not use that anymore).
Until the bug is fixed, the workaround would be to install the PHP5-tidy module.[/quote]
The problem for us has been solved by (and I quote from our Infrastructure Manager): “I’ve recompiled php with the tidy module enabled (I did have it in as a zend module before but it wasn’t finding it so I’ve linked it in statically now)”. I’m guessing this is what you are suggesting above.
Cheers all.