I ran into an issue with the newly-implemented Click-Action option for objects. This is for the 'Buy' option.. I have not checked any of the others.
The Buy click-action seems to works fine for any object that is 5 prims or less - but going over that number causes issues - it just stops working.
Also, if you have a multi-prim object and all of the child prims have the click-action for buy turned on, it won't work.
A bug was submitted to LL for these.