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Hmmm... I signed the CLA earlier today. The email address should match...

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Thanks for being so patient with me. I just added that email to the CLA instead. Figured it would be easier. Let me know if that worked.

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Looking more into this, it's actually not a good fix for the given issue, because of the different ways browsers implement sorting. What should happen is this: When no predicate is provided, the array's contents are checked, and if the array contains objects, no sorting should be done.

you are correct. different vms compare objects differently so this PR is flawed.

I don't understand why you use orderBy filter in this situation at all.

Sure, let me explain my use case, and maybe you could suggest a different way to do it.

I have a table, where each row corresponds to an object, like so:

<table>
    <thead>
        <tr>
            <th ng-click="predicate = 'name'">Name</th>
            <th ng-click="predicate = 'status'">Status</th>
            <th ng-click="predicate = 'date'">Date</th>
        </tr>
    </thead>
    <tbody>
        <tr ng-repeat="item in items | orderBy:predicate">
            <td>{{item.name}}</td>
            <td>{{item.status}}</td>
            <td>{{item.date}}</td>
        </tr>
    </tbody>
<table>

JSFiddle

Before a user clicks on a header cell, there is no predicate (it is undefined). I would expect it not to reorder the array, and I find it really strange that orderBy reverses the order of the array when no predicate is specified, but maybe it's a feature. :)

We have a very similar use case for orderBy in tables like already descriped by @lukasolson
I provided a plnkr to demonstrate this behavior: http://plnkr.co/edit/WE4csJrhb4aQ8ZX1yNXs?p=preview
But we had several cases in production mode with large data set where order wasn't just reversed but in a complete new order. Maybe it is related to the _.identity functionality new to orderBy? Anyways

I would appreciate that orderBy donsn't order a given array as long as predicate and reverse order are undefined.

maybe the easiest solution is to set orderBy defaults to "+ " (plus and space) instead of "+". This will work just fine
http://plnkr.co/edit/sxTb5h9vdkKAb08E0XgM?p=preview

I am also working with large dataset and with m48u fix, it started to work fine in all browsers except for Chrome where it shows wrong first row ( replacement of some random row from following rows ) when the data is first loaded using ng-repeat.Not sure , why it wouldn't work in Chrome only.I tested on FF,Safari,IE and Chrome

I added a PR (#9747), please take a look.

Thanks for the PR, but for me it seems that you're missing the point. By setting predicate to an empty string if not provided the order will end up reversed (same as "+"), which is IMHO wrong.
My idea was to set sortPredicate to ['+ '] (plus and space in line 17298 angular.js) instead of just "+" (plus sign).
This will solve most problems exept for that random first row in Chrome noticed by @mshoaibsheikh as well not only by me