This appears to be a regression or another case of issue
#2193, although my Qt and PyQt versions are different. Linux Mint 10.
After upgrading to tip in the stable branch, the following occurs when starting the workbench and every time the tree is updated:
** Mercurial version (2.3.2). TortoiseHg version (2.5.1+25-d1be42dde1ba) ** Command: ** CWD: /home/tim/hg/storageconsole ** Encoding: UTF-8 ** Extensions loaded: relink, children, churn, graphlog, rebase, purge, highlight, fetch, collapse, prompt, hggit, hgsubversion, remotebranches, versions, punchcard, extdiff ** Python version: 2.6.6 (r266:84292, Sep 15 2010, 16:22:56) [GCC 4.4.5] ** Qt-4.7.0 PyQt-4.7.4 TypeError: native Qt signal is not callable