The test results you have selected are very old and may not represent the current state of Wine.
Selected Test Results (selected in 'Test Results' table below)
What works
With ies4linux installed IE 6 -- shows the map, controls are available.
What does not
Crashes in some special cases (will be better specified later).
What was not tested
Don't know yet :-)
Additional Comments
Our stupid Ministery of Agriculture provides a web application (http://farmar.mze.cz) obligatory to use for all bigger farmers in the Czech Republic without support of any other OS than Win (>=98) and other browser than IE (>=6) with ActiveX. Java and Mozilla versions don't work in this case.
I'm -- this time -- not sure, if the problem specified is in Internet Explorer, MapGuide Viewer, or elsewhere, but I'll inform you :-)