Why am I getting an error when using legend command

After installing R2014a, I have a consistent problem with functions and scripts that have worked in the past, specifically with the "legend" function. As an example, I wrote a simple script:

t = 0:.1:100;
x = [0:.1:100];
plot(t,x)
legend('y');

It produces the following error:

Error using flip
Too many input arguments.

Error in flipud (line 14)
x = flip(x,1);

Error in get_legendable_children (line 61)
ch = flipud(legkids(goodkid));

Error in graph2dhelper (line 31)
        [varargout{1:nargout}] = feval(varargin{:});

Error in legend>make_legend (line 350)
    children = graph2dhelper ('get_legendable_children', ha);

Error in legend (line 284)
            [h,msg] = make_legend(ha,varargin(arg:end));

Error in Test (line 6)
legend('y');

[Star Strider]

I can’t reproduce your error (R2014a). It works fine for me. You may want to Contact Support.

[dpb]

If this doesn't go away with a restart of Matlab submit bug report/service request at mathworks.com

That clearly is just a bug.

[Geoff Hayes]

The error being raised here is identical to that from profiler error with flip. The problem there was that there existed a custom flip function that was interfering with the MATLAB built-in one.

In the Command Window, type

 which flip -all

and check the results. If a custom version of flip does exist, it will appear in this list (and so need to be renamed).

[dpb]

Ewww...Matlab namespace pollution strikes again! Soon there won't be any names left to use as TMW continues to introduce new stuff...

>> which flip
'flip' not found.
>>

[Star Strider]

In R2014a:

which flip -all

produces:

built-in (C:\Program Files\MATLAB\R2014a\toolbox\matlab\elmat\flip)