Problem selecting vertices

Using Blender 2.73 I can no longer select vertices/meshes in wireframe mode. In solid or material mode no problem. Since selection in 2.73 is reported to have been improved I suspect there is some new setting I have missed, but when I google for help, nobody else seems to have this problem. if anyone can point me in the right direction I’d be most grateful.

Tony Stauber

Show us and supply a demo blend file

Sorry for bothering you for nothing, but the problem which has been with me for several days has completely disappeared and I can select vertices/meshes normally.
Tony Stauber. 77 years old.Maybe that’s my problem…