wpmathpub is a WordPress.org plug-in that allows you to display mathematical equations within your posts and comments: without LaTEX or MathML on your server. A new version was released today - version 1.0.6.
This version addresses one problem and improves the control over the two new features released in the last version: 1.0.5
One problem resolved in this version:
Relative addressing to reach key directories failed when admin utilities are executed. The problem showed up as a misleading error message in comment 'display view' during an admin session. The problem is resolved in this version.
Control of features was enhanced as well:
a) Deactivation of auto-write access,
b) Deactivation of math equations within comments.
See the plugin's Faq page for more details: