Save failed when adding new topic

When ever I try and save a new topic the I get the message Save failed. I have checked permissions and files are maked as writable, I have loged out cleared cache and loged back in, what am I missing here Im sure its somthing simple I have missed.
[attachment=0]savefailed.jpg[/attachment]

Well it turns out I am an idiot, all fixed now. For others having this problem here is the solution
1. Go and get some sleep
2. Try again and this time fill out the subject feild 😶
Is it possible to add please fill out subject feild to the save failed message, just incase there are some people out there who are as dumb as me.

Hello,

Thanks for posting about this issue, I have fixed it!

Regards,
Max