Eclipse Helios/Galileo Update sites cannot be accessed on Windows machine with IE7

When starting the update, the following error is displayed:

Network connection problems encountered during search. Unable to access "http://download.eclipse.org/releases/helios". Error accessing site stream. [Server returned HTTP response code: 503 for URL: http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd] Server returned HTTP response code: 503 for URL: http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd Error accessing site stream. [Server returned HTTP response code: 503 for URL: http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd] Server returned HTTP response code: 503 for URL: http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd

As described at

http://www.w3.org/blog/systeam/2008/02/08/w3c_s_excessive_dtd_traffic http://www.outofcontrol.ca/2009/02/20/w3org-dtdxhtml1-strictdtd-blocks-windows-ie-users/

w3.org blocks IE calls to http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd (as it is loading it much too frequently). I was able to load the DTD by setting a different UserAgent for IE7 using

%windir%\System32\cmd.exe /k %windir%\System32\reg.exe ADD "HKLM\Software\Microsoft\Windows\CurrentVersion\Internet Settings\5.0\User Agent" /v Version /d "Opera/9.2.1" /f

I tried to -D overrides suggested at:

Change user agent in Eclipse 3.5 for new software installations

t开发者_运维百科o no avail. I think eclipse does not follow the User-Agent set by IE7 ...

Is there an other way to override the User-Agent for Eclipse?

Thanks

Eclipse has gone "Market", joining AppStore by Apple and Marketplace by google.

From Help Menu, try Eclipse Marketplace instead of Install New Software to install and update your required plug-in

This seems to be related to using the "classic updater" against Helios update site as described at

https://bugs.eclipse.org/bugs/show_bug.cgi?format=multiple&id=317957

I have the same problem both on Galileo and Helios and Windows 7 64 bit, and have found yet no solution (adding a '/' or removing a '/' to the end of the update sites URLs does not work).

In Helios, at least, I have found that using the "Eclipse Marketplace" for updates/addins does work.