Thanks to Val's comment on Egyptological for this link. Further to my previous post, the University of Basel have also posted an announcement in English, which repeats the details offered in the German version, but with a different photograph.
During the season of 2011, three edges of an unknown manmade feature appeared at 1.80m to the north of KV 40, on the 25th of January, the first day of the Egyptian revolution. Due to the situation, it was immediately covered with an iron door.
As this structure is so close to KV 40 and as it was impossible to know whether it was just a short unfinished shaft or a real tomb, we gave it the temporary number 40b. This number is now replaced by the final designation KV 64. The KV numbers should definitely be used exclusively for real tombs or deposits and not for possible cavities and yet unascertained structures.
This season, work was resumed on January 8th. With the permission of the Ministry of State of Antiquities we started to work on the unknown structure.
It soon turned out to be a rock-cut tomb of the 18th dynasty, 15th century BCE. In the shaft the upper edge of the door appeared at a depth of about 2.5m. The shaft measures approximately 1.10m by 1.60m. Its fill showed no evidence of being affected by flood water.
In the blocking of the entrance, two stages of use could be observed. Large stones in front and over the entrance belong to a secondary occupation. Of the primary phase dating to the 18th dynasty, some 0.50cm of the plaster seal of the entrance and a Nile silt flower pot with remnants of this plaster remain on the floor of the shaft.
See the above page for more.