If I try to open a file with krita 2.1.1 (kde 4.3.5) on a folder called ~/Imágenes I get an error, something like "Cannot open <file> Reason: cannot create storing".
This error prompts if I attempt to open the file from Dolphin or from krita's "Open" dialog. Issuing on Konsole "krita ~/Imágenes/file.jpg" gives no extra info: krita start to load, show the error and quit when I accept the message.
With 2.0.x there was no problem.

yes, I had this bug too, and was fixed by boud in trunk

https://bugs.kde.org/228813