User-Agent: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.7.10) Gecko/20050716 Firefox/1.0.6 Build Identifier: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.7.10) Gecko/20050716 Firefox/1.0.6 If you have both Novell Groupwise 6.5 and Thunderbird installed. Thunderbird will break Groupwise 6.5. When Thunderbird launches, it replaces the groupwise installed mapi32.dll (4.0.835.1374 - Extended MAPI 1.0 for Windows NT) in the windows/system32 folder with Thunderbird perfered one mapi32.dll (1.0.0.0 - Mozilla Thunderbird MAPI Dll) My work around is I've created a batch file that swaps out the mapi32.dll then calls groupwise to launch. Reproducible: Always Steps to Reproduce: 1. Install GroupWise / Run Groupwise 2. Install Thunderbird / Run Thunderbird 3. Try to run Groupwise Again Actual Results: Groupwise will not launch / error out. Expected Results: Both apps should work.

Duplicate of Core bug 109362?

If confirmation is needed then I can confirm this; I am on win2k (there is a load of other bugs in the bugzilla that look like dupes). I think problem is caused by the fact that GroupWise (and some other apps using mapi32.dll) link against its functions using ordinal numbers rather than function names. In any case, Thunderbird should not be preplacing this dll in the system dirs -- if thunderbird needs a different version that is already installed (and I am not sure it does, since after restoring the original mapi32.dll it seems to work OK), then it should install it where thunderbird.exe is.

I think users should be warned to backup their mapi32.dll before upgrading to Thunderbird 1.0.7. Unfortunately this bug is not even confirmed yet. See http://www.mozilla.org/products/thunderbird/releases/1.0.7-release-notes.html#install

*** This bug has been marked as a duplicate of 109362 ***