SL 2.0 IE6 hangs browser on return from sending data to Data Services

06-24-2009 12:55 PM |

I have a Silverlight app I am releasing to a number of users, and 2 IE6 users have a serious issue where the app causes the browser to hang on any attempt to send an update to a Data Services endpoint. The request IS received as the requested updates are made to the database. Reading data from Data Services is no issue, and maybe 30 or 40 other installations have no problem like this, also it has been tested with IE6 in the development office with no issues.

One user has McAfee and the other has Symantec, so it doesn't seem likely to be a scanner issue. Using Firefox on one of the machines I did not encounter the problem. I tried connecting via http and https and the issue appeared in both protocols when using IE6. It occurs at all points in the app where it attempts to write data.

I wonder if SL on IE6 relies on the user having received a Windows Update which is missing from these machines. I can only think the issue has something to do with Post Tunnelling as that is the only qualitative difference between read and write requests to Data Services.

Hoping someone has a clue

James