JabRef 4.0.0-dev--snapshot--2017-05-16--master--f81716173
Windows 7 6.1 amd64
Java 1.8.0_131
Steps to reproduce:
- Select on entry and try to edit it
- The fields in Optional Fields are not visible since jabref squeezes all the fields on the visible display instead of allowing scrolling.
- When changing to the next entry jabref does not stay in the Optional Fields tab (or any other) but switches to Required fields, always.

Opening: K:\BuchprojektSpringer\VierteAuflage\Literatur\testisDevelopment.bib
Opening: K:\BuchprojektSpringer\VierteAuflage\Literatur\stra8AndMeiosis.bib
Opening: K:\BuchprojektSpringer\VierteAuflage\Literatur\ovarianDevelopment.bib
Opening: K:\BuchprojektSpringer\VierteAuflage\Literatur\leptin.bib
Opening: K:\BuchprojektSpringer\VierteAuflage\Literatur\adiponectin.bib
Opening: K:\BuchprojektSpringer\VierteAuflage\Literatur\thyroidHormon.bib
Opening: K:\BuchprojektSpringer\VierteAuflage\Literatur\Cannon2004_CitiertIn.bib
Opening: K:\BuchprojektSpringer\VierteAuflage\Literatur\EndokrinologieKunde.bib
Opening: K:\BuchprojektSpringer\VierteAuflage\Literatur\FatMetabolism.bib
Could not parse date 2005(?)
Uncaught exception Occurred in Thread[JavaFX Application Thread,5,main]
java.lang.ArithmeticException: / by zero
at org.jabref.gui.entryeditor.EntryEditorTab.setupPanel(EntryEditorTab.java:228)
at org.jabref.gui.entryeditor.EntryEditorTab.lambda$new$0(EntryEditorTab.java:90)
at com.sun.javafx.application.PlatformImpl.lambda$null$173(PlatformImpl.java:295)
at java.security.AccessController.doPrivileged(Native Method)
at com.sun.javafx.application.PlatformImpl.lambda$runLater$174(PlatformImpl.java:294)
at com.sun.glass.ui.InvokeLaterDispatcher$Future.run(InvokeLaterDispatcher.java:95)
at com.sun.glass.ui.win.WinApplication._runLoop(Native Method)
at com.sun.glass.ui.win.WinApplication.lambda$null$148(WinApplication.java:191)
at java.lang.Thread.run(Unknown Source)
Could not parse date 1927, 14 May
Could not parse date 2005(?)
DoiResolution fetcher failed:
java.net.SocketTimeoutException: Read timed out
at java.net.SocketInputStream.socketRead0(Native Method)
at java.net.SocketInputStream.socketRead(Unknown Source)
at java.net.SocketInputStream.read(Unknown Source)
at java.net.SocketInputStream.read(Unknown Source)
at sun.security.ssl.InputRecord.readFully(Unknown Source)
at sun.security.ssl.InputRecord.read(Unknown Source)
at sun.security.ssl.SSLSocketImpl.readRecord(Unknown Source)
at sun.security.ssl.SSLSocketImpl.readDataRecord(Unknown Source)
at sun.security.ssl.AppInputStream.read(Unknown Source)
at java.io.BufferedInputStream.fill(Unknown Source)
at java.io.BufferedInputStream.read1(Unknown Source)
at java.io.BufferedInputStream.read(Unknown Source)
at sun.net.www.http.HttpClient.parseHTTPHeader(Unknown Source)
at sun.net.www.http.HttpClient.parseHTTP(Unknown Source)
at sun.net.www.protocol.http.HttpURLConnection.getInputStream0(Unknown Source)
at sun.net.www.protocol.http.HttpURLConnection.getInputStream(Unknown Source)
at java.net.HttpURLConnection.getResponseCode(Unknown Source)
at sun.net.www.protocol.https.HttpsURLConnectionImpl.getResponseCode(Unknown Source)
at org.jsoup.helper.HttpConnection$Response.execute(HttpConnection.java:655)
at org.jsoup.helper.HttpConnection$Response.execute(HttpConnection.java:676)
at org.jsoup.helper.HttpConnection$Response.execute(HttpConnection.java:628)
at org.jsoup.helper.HttpConnection.execute(HttpConnection.java:260)
at org.jsoup.helper.HttpConnection.get(HttpConnection.java:249)
at org.jabref.logic.importer.fetcher.DoiResolution.findFullText(DoiResolution.java:53)
at org.jabref.logic.importer.FulltextFetchers.findFullTextPDF(FulltextFetchers.java:66)
at org.jabref.gui.fieldeditors.LinkedFilesEditorViewModel.lambda$fetchFulltext$6(LinkedFilesEditorViewModel.java:174)
at org.jabref.gui.util.BackgroundTask.call(BackgroundTask.java:63)
at org.jabref.gui.util.DefaultTaskExecutor$1.call(DefaultTaskExecutor.java:63)
at javafx.concurrent.Task$TaskCallable.call(Task.java:1423)
at java.util.concurrent.FutureTask.run(Unknown Source)
at java.util.concurrent.Executors$RunnableAdapter.call(Unknown Source)
at java.util.concurrent.FutureTask.run(Unknown Source)
at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
at java.lang.Thread.run(Unknown Source)
Edit: I deleted duplicates from the error log.
JabRef 4.0.0-dev--snapshot--2017-05-16--master--f81716173
Windows 7 6.1 amd64
Java 1.8.0_131
Steps to reproduce:
Edit: I deleted duplicates from the error log.