Opera 15.0.1147.153 on Windows 7 64-bit (WoW64), ABP 1.5.3 and 1.5.3.984.
1. Open this link.
2. Click on the URL linking to "http://s14.directupload.net/file/" there.
Ads aren't fully blocked for some reason there. Chrome version is fine btw.
[Opera] Ads aren't blocked on pages opened in new tab
Re: [Opera] Ads aren't blocked on pages opened in new tab
No longer reproducible in the latest stable version of Opera (20.0.1387.77).
Re: [Opera] Ads aren't blocked on pages opened in new tab
If the issue should reoccur, please file it at https://issues.adblockplus.org