This is a screenshot of the error

Today I got the following error while after clicking "save" on this edit:
http://en.wikipedia.org/w/index.php?title=File:Finitesubgroups.svg&diff=404205607&oldid=223252675

Internal error
PPFrame_DOM::expand: Invalid parameter type
Backtrace:
#0 /usr/local/apache/common-local/wmf-deployment/includes/parser/Parser.php(2733): PPFrame_DOM->expand(Object(PPNode_DOM), 0)
#1 /usr/local/apache/common-local/wmf-deployment/includes/parser/Parser.php(935): Parser->replaceVariables('(SVG file, nomi...')
#2 /usr/local/apache/common-local/wmf-deployment/includes/parser/Parser.php(335): Parser->internalParse('(SVG file, nomi...')
#3 [internal function]: Parser->parse('(SVG file, nomi...', Object(Title), Object(ParserOptions), true, true, NULL)
#4 /usr/local/apache/common-local/wmf-deployment/includes/StubObject.php(58): call_user_func_array(Array, Array)
#5 /usr/local/apache/common-local/wmf-deployment/includes/StubObject.php(76): StubObject->_call('parse', Array)
#6 [internal function]: StubObject->__call('parse', Array)
#7 /usr/local/apache/common-local/wmf-deployment/includes/OutputPage.php(1145): StubObject->parse('(SVG file, nomi...', Object(Title), Object(ParserOptions), true, true, NULL)
#8 /usr/local/apache/common-local/wmf-deployment/includes/GlobalFunctions.php(884): OutputPage->parse('(SVG file, nomi...', true, true)
#9 /usr/local/apache/common-local/wmf-deployment/includes/media/SVG.php(118): wfMsgExt('svg-long-desc', 'parseinline', '700', '472', '20 KB')
#10 /usr/local/apache/common-local/wmf-deployment/includes/filerepo/File.php(1251): SvgHandler->getLongDesc(Object(LocalFile))
#11 /usr/local/apache/common-local/wmf-deployment/includes/ImagePage.php(330): File->getLongDesc()
#12 /usr/local/apache/common-local/wmf-deployment/includes/ImagePage.php(102): ImagePage->openShowImage()
#13 /usr/local/apache/common-local/wmf-deployment/includes/Wiki.php(493): ImagePage->view()
#14 /usr/local/apache/common-local/wmf-deployment/includes/Wiki.php(70): MediaWiki->performAction(Object(OutputPage), Object(ImagePage), Object(Title), Object(User), Object(WebRequest))
#15 /usr/local/apache/common-local/wmf-deployment/index.php(117): MediaWiki->performRequestForTitle(Object(Title), Object(ImagePage), Object(OutputPage), Object(User), Object(WebRequest))
#16 /usr/local/apache/common-local/live-1.5/index.php(3): require('/usr/local/apac...')

#17 {main}

Version: unspecified
Severity: enhancement

Attached: