This one took a little futzing around and digging through the TinyMCE forum to figure out, but it’s been nagging at me for a while. By default (or at least in the default configuration provided under the LG TinyMCE extension for ExpressionEngine), TinyMCE will remove the alt
attribute if it is empty. Obviously, for accessibility and validation reasons, this is highly undesirable and needs correcting. Thankfully, the fix is pretty simple: add the following to your TinyMCE configuration options: