QT for some reason messes with XCompose causing broken input (Qt 5 only - Qt 4 did not break anything). In Qt 5.2 and 5.3 this was causing an invalid conversion in chat messages containing these resulting in the bad bytes being stripped. In Qt 5.9 it is still broken, but you at least get a string with something in it. This checks for non-zero converted strings for room creation and chat lines.
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "https://www.apple.com/DTDs/PropertyList-1.0.dtd">
<plist version="1.0">
<dict>
<key>LSApplicationCategoryType</key>
<string>public.app-category.strategy-games</string>
<key>CFBundleName</key>
<string>Hedgewars</string>
<key>CFBundleExecutable</key>
<string>hedgewars</string>
<key>CFBundleGetInfoString</key>
<string>https://www.hedgewars.org</string>
<key>CFBundleIconFile</key>
<string>Icon.icns</string>
<key>CFBundleIdentifier</key>
<string>org.hedgewars.desktop</string>
<key>CFBundlePackageType</key>
<string>APPL</string>
<key>CFBundleSignature</key>
<string>Hedge</string>
<key>CFBundleVersion</key>
<string>${HEDGEWARS_REVISION}</string>
<key>CFBundleShortVersionString</key>
<string>${HEDGEWARS_VERSION}</string>
<key>NSHumanReadableCopyright</key>
<string>Copyright © 2004-2015, Hedgewars Project</string>
<key>NSAppleScriptEnabled</key>
<true/>
<key>LSRequiresNativeExecution</key>
<true/>
<key>LSMinimumSystemVersionByArchitecture</key>
<dict>
<key>x86_64</key>
<string>10.6.0</string>
<key>i386</key>
<string>10.4.0</string>
<key>ppc</key>
<string>10.4.0</string>
</dict>
<key>LSArchitecturePriority</key>
<array>
<string>x86_64</string>
<string>i386</string>
<string>ppc</string>
</array>
<key>LSMinimumSystemVersion</key>
<string>${minimum_macosx_version}</string>
<key>NSHighResolutionCapable</key>
<string>True</string>
<key>SUPublicDSAKeyFile</key>
<string>dsa_pub.pem</string>
<key>SUFeedURL</key>
<string>https://www.hedgewars.org/download/appcast.xml</string>
<key>CFBundleLocalizations</key>
<array>
<string>ar</string>
<string>bg</string>
<string>cs</string>
<string>da</string>
<string>de</string>
<string>el</string>
<string>en</string>
<string>es</string>
<string>fi</string>
<string>fr</string>
<string>gl</string>
<string>hu</string>
<string>it</string>
<string>ja</string>
<string>ko</string>
<string>lt</string>
<string>nl</string>
<string>pl</string>
<string>pt_BR</string>
<string>pt_PT</string>
<string>ro</string>
<string>ru</string>
<string>sk</string>
<string>sv</string>
<string>tr_TR</string>
<string>uk</string>
<string>zh_CN</string>
<string>zh_TW</string>
</array>
<key>UTExportedTypeDeclarations</key>
<array>
<dict>
<key>UTTypeIdentifier</key>
<string>org.hedgewars.desktop.hws</string>
<key>UTTypeReferenceURL</key>
<string>https://www.hedgewars.org/demos/</string>
<key>UTTypeDescription</key>
<string>Hedgewars Save Game</string>
<key>UTTypeIconFile</key>
<string>public.text.icns</string>
<key>UTTypeConformsTo</key>
<array>
<string>public.data</string>
</array>
<key>UTTypeTagSpecification</key>
<dict>
<key>public.filename-extension</key>
<array>
<string>hws</string>
</array>
<key>public.mime-type</key>
<string>application/x-hedgewars-save</string>
</dict>
</dict>
<dict>
<key>UTTypeIdentifier</key>
<string>org.hedgewars.desktop.hwd</string>
<key>UTTypeReferenceURL</key>
<string>https://www.hedgewars.org/demos/</string>
<key>UTTypeIconFile</key>
<string>public.text.icns</string>
<key>UTTypeDescription</key>
<string>Hedgewars Demo Game</string>
<key>UTTypeConformsTo</key>
<array>
<string>public.data</string>
</array>
<key>UTTypeTagSpecification</key>
<dict>
<key>public.filename-extension</key>
<array>
<string>hwd</string>
</array>
<key>public.mime-type</key>
<string>application/x-hedgewars-demo</string>
</dict>
</dict>
</array>
<key>CFBundleDocumentTypes</key>
<array>
<dict>
<key>CFBundleTypeIconFile</key>
<string>hwico.icns</string>
<key>CFBundleTypeName</key>
<string>Hedgewars Savefile</string>
<key>LSItemContentTypes</key>
<array>
<string>org.hedgewars.desktop.hws</string>
</array>
<key>CFBundleTypeRole</key>
<string>Editor</string>
</dict>
<dict>
<key>CFBundleTypeIconFile</key>
<string>hwico.icns</string>
<key>CFBundleTypeName</key>
<string>Hedgewars Demofile</string>
<key>LSItemContentTypes</key>
<array>
<string>org.hedgewars.desktop.hwd</string>
</array>
<key>CFBundleTypeRole</key>
<string>Viewer</string>
</dict>
</array>
<key>CFBundleURLTypes</key>
<array>
<dict>
<key>CFBundleURLName</key>
<string>Hedgewars URIs</string>
<key>CFBundleURLSchemes</key>
<array>
<!--
<string>hwd</string>
<string>hws</string>
<string>hwdlc</string>
-->
<string>hwplay</string>
</array>
</dict>
</array>
</dict>
</plist>