If you are going to render a LaTex mathematical formula, you can see the following tutorial as a reference:
JLatexMath Tutorial for Rendering LaTex Formulas in Java

I haven't tried this before. I think you can first render the LaTex syntax into an image and then embedded the image back into the page. Hope this help.

Hi, I've commit the fix as r224.
JForum will disable the submit button until the captcha image is fully loaded.
Please check out and test if this works.

Please provide your system environment for more information. Thanks~

I found that this issue can be reproduced at the first time Java VM starts to load the Captcha engine.
When the Captcha engine is not ready, the imageCaptcha will return null.
A quick fix is to replace the last return statement from return true to return false.

public boolean validateCaptchaResponse(String origUserResponse)

	{

		String userResponse = origUserResponse;

		if ((SystemGlobals.getBoolValue(ConfigKeys.CAPTCHA_REGISTRATION) 

				|| SystemGlobals.getBoolValue(ConfigKeys.CAPTCHA_POSTS))

				&& this.imageCaptcha != null) {

			

			if (SystemGlobals.getBoolValue(ConfigKeys.CAPTCHA_IGNORE_CASE)) {

				userResponse = userResponse.toLowerCase(Locale.US);

			}

			

			final boolean result =  this.imageCaptcha.validateResponse(userResponse).booleanValue();

			this.destroyCaptcha();

			return result;

		}

		

		return false;

	}

Please provide your system configuration for more information. Thanks~

What are your cookies's name?
Are they all ASCII characters?

See this if they help:
http://www.velocityreviews.com/forums/t144469-with-request-getcookies-i-do-not-get-all-cookies.html
http://stackoverflow.com/questions/1969232/allowed-characters-in-cookies
http://www.ietf.org/rfc/rfc2965.txt

Hi, I've tested it in my development environment, the captcha for post is enabled by default. And if I didn't enter any text in the captcha field, although I can press the save button, JForum will prompt me to enter the captcha.

As I know, the JForum logo was created by JForum team(Pablo Marutto, http://jforum.net/team.jsp).
And the logo is part of the project. Since JForum2 is released under the BSD-style license, you can modify it as you like.

You can check the default setting in your jforum's WEB-INF/config/SystemGlobals.properties first:

# ########

# Captcha

# ########

captcha.registration = true

captcha.posts = true

captcha.ignore.case = true



captcha.width = 250

captcha.height = 75



captcha.min.words = 4

captcha.max.words = 6



captcha.min.font.size = 25

captcha.max.font.size = 35

And if you want to match captcha case, change captcha.ignore.case to false.
Add the setting into your jforum's WEB-INF/config/jforum-custom.conf to override the default setting:

captcha.ignore.case = false

If you want to deny anonymous post in JForum, just go to Admin Control Panel > Group Managment > General > Permission
Choose all boards in the deny anonymous post section.

Hi, check this post first if it help.
http://jforum.andowson.com/posts/list/35.page

1.You can check Tomcat's catalina.out first for some exception message as a hint.

2.Check if your JAVA_OPTS has -Djava.awt.headless=true set. For example:

JAVA_OPTS="-server -Xss256k -Xms2048m -Xmx2048m -XX:NewSize=512m -XX:MaxNewSize=512m -XX:SurvivorRatio=8 -XX:PermSize=256m -XX:MaxPermSize=256m -Djava.net.preferIPv4Stack=true -Djava.awt.headless=true"

You can refer to this http://www.andowson.com/posts/list/72.page

A quick check is to see if you have some similar setting in jforum-custom.conf:

authentication.type=sso
sso.implementation=net.jforum.sso.CookieUserSSO
sso.redirect=http://member.yoursite.com/login.jsp
cookie.name.user=username

It means after user logged in from member.yoursite.com, login.jsp will write a username cookie for username in yoursite.com and the cookie's domain is yoursite.com and then redirect to your jforum webapp with returnUrl.

The history is as follows:
jforum.net: v2.1.8->([v2.1.9])->v2.1.9
jforum2.googlecode.com:v2.1.8->([v2.1.9])->v2.2.0->v2.2.1->v2.3.0->v2.3.1->v2.3.2->v2.3.4

Originally Rafael didn't want to have a v2.1.9 release of JForum. He wanted to focus the developing efforts into JForum3. However, there were still some security bugs in v2.1.8. So I started jforum2 project and added my patches privately on my site. The jforum2 project is branched from the v2.1.8 codebase, and fixes many bugs reported on the jforum.net community. I called my work as ([v2.1.9]) then gave it back to Rafael and then released by jforum.net(Rafael did some changes on the template images). Rafael then keeps focusing on JForum 3 till now.

One day, my site(www.andowson.com)'s server was broken. And I decided to use googlecode as a new hosting for jforum2 code. JForum 2.1.x supports Java 1.4 and I decided to require Java 5 in the future release of JForum2. So the release version just started from v2.2.0 to have a distinguish.

To sum up, JForum v2.2.0 includes the bug fix in v2.1.9 (except the template images change).

If you want to upgrade from v2.1.9 to v2.3.4. You can just upgrade to the latest version v2.3.4 and then apply the database patch from v2.2.0 and v2.3.2. And do reindex you lucene from the Admin control panel.

You can read these articles for futher information:
http://docs.oracle.com/javase/jndi/tutorial/ldap/security/ldap.html
http://www.javaworld.com/javaworld/jw-03-2000/jw-0324-ldap.html
http://ahm507.blogspot.tw/2007/01/authenticating-users-with-windows.html
And maybe you can change the ldap.authentication value to "DIGEST-MD5" and check if it works.