Jun-Yuan Ji, Justin Crest, Gerold Schubiger 1876Development132, 1875-1884.

Two errors on p. 1876 were not corrected before going to press.

The last paragraph of the Introduction should start, `The investigations of the Pim-Thr-Sse complex...'.

In the Materials and methods, under the sub-heading `Stocks', the last mention of histone-GFP should read `histone-GFP/+'.

We apologise to the authors and readers for these mistakes.