You most probably have a JavaScript conflict – your wp theme or another plugin – which needs to be fixed. This codex article explains what this means and what to look for:

http://codex.simple-press.com/codex/faq/troubleshooting/what-is-this-jquery-conflict/

We can, of course, help if you give us a link to the forum page.

and yes, you cannot enter any name in there…  the autocomplete, when selected, populates a different form with the user…

The forum is located here: http://lootpalace.com/forum

I will do some JavaScript debugging tomorrow to see if I can nail down the problem

yes, your site is throwing numerous javascript errors… but it also looks like you are caching the forum page which will cause those errors… you cannot cache the forum page… you must tell w3tc to ignore the wp page the forum is on for ALL types of caching in use… there is one page of settings per cache type with w3tc…

Mr Papa said
yes, your site is throwing numerous javascript errors… but it also looks like you are caching the forum page which will cause those errors… you cannot cache the forum page… you must tell w3tc to ignore the wp page the forum is on for ALL types of caching in use… there is one page of settings per cache type with w3tc…

I’ve gone into W3 Total Cache and added the following for “Never cache these pages” will it be sufficient?

forum/*
forum

I am still doing some JS debugging on my end, if anyone happens to spot the problem before I reply saying I’ve fixed it, any help is much appreciated and I am happy to to drop a few bucks in a tip-jar for whoever helps

with w3tc, it depends…  there are multiple different kinds of caching… page, db, etc…  each one has their own settings tab within the w3tc admin panels…

for each one you use, there is a section where you can tell it what pages to ignore..  each needs to get your ignore strings there…