The 4th parameter for htmlspecialchars was added in PHP 5.2.3. Madvic is probably using an older version.

If you want GS to be compatible with those PHP versions, it may be fixed by editing admin/inc/basic.php, line 471, changing:

$text = htmlspecialchars($text, ENT_QUOTES, 'UTF-8', false);

to:

$text = str_replace('"', '"', str_replace("'", ''', $text) );

(I hope it doesn't break anything. It should do the same, though maybe uglier)

Not at all madvic, you found an issue!

BTW it's my fault: I had suggested the changes for that line in the code.
Now it has to be changed in some way (maybe like what I suggested above, can you test it?) or else the minimum PHP version required for GS 3.1 will be 5.2.3.

Yes, nice idea. I think that would work with no major problems.

Anyway I'll do some test later at home and tell you...

@mvlcek

Or maybe just change the error to "You cannot save a page with no title (or slug)" ?

BTW you lose the body content when this happens... That would make another issue, but perhaps it's a bit late, maybe for 3.2...

Not major, and not something alot of people would do, but if you rename a plugin file.
You get a ton of errors. But I have some conflicting filename plugins from extend i was trying to install.
( they really should use a unique forced prefix naming convention, perhaps extend user id or something )

Then load plugings you get

Notice: Undefined index: name.php in plugins.php
blah.... etc

I imagine this is because the filecount is still the same, so perhaps a missing index can be treated as a change and cause a rescan of plugins. This doesn't happen when you delete a file.

Also I dont know how plugins are getting the plugin name and linking to extend, it seems to be using the filename somehow and not the plugins registered name, which just seems odd and causes renaming plugins to break the title in plugins list.

marcco: what is showing when it doesnt work?