Hi,
Had exactly the same issue with an enlarged mouse cursor as others have described. Have a Samsung Syncmaster 2494HS connected over HDMI, and an old Dell monitor connected over DVI to the same Asus HD7790 Direct CU II OC. Running Win7 x64.
Updated to the latest 13.11 Beta from here:
http://www2.ati.com/drivers/beta/amd_catalyst_13.11_betav1.exe
Still had exactly the same large mouse pointer issue. I then went into Control Panel\All Control Panel Items\Personalization and into Change Mouse Pointers, and then changed my Scheme to '(None)' and clicked apply. I then selected 'Windows Aero (system scheme)' and clicked Apply. I then clicked on the 'Use Default' button next to 'Enable Pointer Shadow', then turned off the 'Enable Pointer Shadow' and clicked apply. Then I turned on the 'Enable Pointer Shadow' and clicked apply.
At that point my mouse cursor went back to normal size! It's extremely weird that those steps described above fixed it, but they did. I haven't rebooted yet, but will try that next and see if it has permanently fixed the problem. Hopefully it has.
Posting the exact steps I took just in case it helps someone else out.
Cheers
T