A few nice compatibility test images I found:

the Deep Space Network compatibility testing trailer


Image by MissionControl
Well before a DSN-using spacecraft is launched, this trailer is towed to the project site to test communications with the DSN.

Grace & Dave’s compatibility test


Image by pocketmonsterd

Check out these compatibility test images:

Compatibility Testing PMOG with Lynx


Image by justin
Does Passively Multiplayer support Lynx? Not really.

To be honest, I mostly just wanted to score "Lynx" as a web browser I’ve used in my PMOG personal profile. Ahem.

Mobile web compatibility test


Image by adactio
Sony Ericsson K600i: FAIL

The Marital Compatibility Test: Hundreds of Questions for Couples to Answer Together

Little things can make or break a relationship. Wet towels on the bathroom floor, bread crumbs in the sheets from a late-night sandwich, a thermostat set on 75 when you prefer 68. Such incidents may seem trivial to couples in the throes of passion, but newlyweds often find that passion cools with the reality of living together. This book encourages couples to communicate with each other early on to head off disagreements after the knot is tied. From wet towels to managing the check book, hundred

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A few nice compatibility test images I found:

Ethanol Compatibility Test Chamber


Image by oakridgelabnews
Specimens of various types of materials are mounted on a sleeve that fits inside the compatibility test chamber. The test chamber allows these materials to be exposed to a moving fluid at elevated temperatures for long periods of time. The materials tested include metals and polymers used in fuel dispensers. The tests are designed to assess the compatibility of these materials with intermediate ethanol blends. Photo by Jason Richards.

Compatibility testing


Image by Marco Wessel
And fixing. Stupid IE and its weird ideas about pixel sizes and CSS and whatnot.

ltr: IE6, IE5, Safari/firefox/opera, Firefox