Some residents have noticed that clicking objects/agents/land seems to fail when they try to interact with them. I may have two workarounds that may help.
1.) The WASDEC Wiggle. Hit your movement keys in any order making sure to hit your jump/fly up key, and crouch/fly down key at least once. This works sometimes, but not all the time.
2.) Use your mouse scroll wheel to zoom out several "clicks", then hit escape a few times to return to normal view. This seems to work throughout your session.
If you do suffer from this bug by all means send a bug report via e-mail to Linden Lab. If possible include a DirectX Diagnostic report which can be generated from your dxdiag tool from the Windows command line.
