radiotray crashed with XPathEvalError if a group name contains a single quote

[Oliver Joos]

A group name containing a single quote ' (e.g. "Puls'Radio") can be entered. But then RadioTray crashes, even when restarted! I had to edit ~/.local/share/radiotray/bookmark.xml manually to make it start again.

I think special characters should be escaped to allow them passing through XPath. Or (less convenient) the group name textfield could ignore/reject keystrokes of such characters. Or (least convenient) they could be replaced with underscores _ or similar.

This bug occurs in my Ubuntu 11.04 with radiotray 0.6.1-1 and with radiotray 0.6.4 (installed from deb-file).

ProblemType: Crash
DistroRelease: Ubuntu 11.04
Package: radiotray 0.6.1-1
ProcVersionSignature: Ubuntu 2.6.38-15.60-generic 2.6.38.8
Uname: Linux 2.6.38-15-generic i686
Architecture: i386
Date: Fri Jun 29 14:37:39 2012
EcryptfsInUse: Yes
ExecutablePath: /usr/bin/radiotray
InstallationMedia: Ubuntu 11.04 "Natty Narwhal" - Release i386 (20110427)
InterpreterPath: /usr/bin/python2.7
ProcCmdline: /usr/bin/python /usr/bin/radiotray
ProcEnviron:
 LANGUAGE=de_CH:en
 PATH=(custom, user)
 LANG=de_CH.UTF-8
 SHELL=/bin/bash
PythonArgs: ['/usr/bin/radiotray']
SourcePackage: radiotray
Title: radiotray crashed with XPathEvalError in lxml.etree._XPathEvaluatorBase._raise_eval_error (src/lxml/lxml.etree.c:112894)(): Invalid predicate
UpgradeStatus: No upgrade log present (probably fresh install)
UserGroups: adm admin audio bluetooth cdrom dialout lpadmin plugdev pulse pulse-access sambashare vboxusers www-data