(IDEM) I'm having a similar issue: When a user submits an ad they get the following message:

Error 1064
You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near ')' at line 1 SQL=INSERT INTO bsd_adsmanager_adcat(adid,catid) VALUES (400,)

How do I check the javascript console?

Adsmanager 3.0.3
Versión Joomla! 3.3.6 Stable
Versión de PHP 5.3.28

(IDEM) I'm having the same problem! and I believe that nothing changes was the overnight, began to malfunction .. ??? 1) in posting form does not show full boxes of choice of categories, not shown button to load images, also shows preview. 2) When a user sends a notice of this form half receive the following message:

Error 1064
You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near ')' at line 1 SQL=INSERT INTO bsd_adsmanager_adcat(adid,catid) VALUES (400,)

Adsmanager 3.0.3
Versión Joomla! 3.3.6 Stable
Versión de PHP 5.3.28

i need help! Thank You

He returned to work! few days ago I had changed server and the detected that SQL syntax error in the form of new ad. Return to the old server and everything worked again ... Thanks loic!

I've been investigating further: specifically why a CBSubs subscription breaks the page. After much back and forth with their tech support the conclusion they came to was that it is JQuery related.

"Your issue is due to the way Ads Manager loads its jQuery. It does not appear to be using Joomla document API. This results in the jQuery it needs being loaded before core jQuery is loaded."

Hoping you can shed further light on this.

Cheers
g