Preamble:
I did a clean install of SugarCE-Full-5.0.0 on my Apache2.2.3/PHP5.2.0/MySQL5.0.26 Linux-Machine. Since installing from Sugar did not work on v5.0 (Incompatible Versions '100'), I downloaded the Forums-Module .zip and uploaded it to the server.

When I clicked the "install"- and afterwards "commit"-buttons, I first experienced an installation halt at somewhat 27%. Inspecting the install log showed, that copying some files did not work correctly. Apparently due to some permission issues, even though I set the whole directory's (and subdir's) group to :www (apache running under wwwrun:www) and g+w for the necessary directories/files (cache etc.). Switching ownership to wwwrun:www solved this problem.

Problem:
Now I see the progress bar advancing to 100% and the install logs shows:
Installing Administration Section
Rebuilding administration Section...
Installing Subpanel Layouts
Rebuilding Layoutdefs...
Installing Relationships
Rebuilding Vardefs...
Rebuilding Layoutdefs...
Rebuilding administration Section...
Installing Language Packs
Rebuilding Language...en_us
Adding for Leads
Adding for Contacts
Adding for Accounts
Adding for Opportunities
Adding for Cases
Adding for Notes
Adding for EmailTemplates
Adding for Calls
Adding for Emails
Adding for Meetings
Adding for Tasks
Adding for Bugs
Adding for Project
Adding for ProjectTask
Adding for Campaigns
Adding for ProspectLists
Adding for Prospects
Adding for Documents
Adding for EmailMarketing
Adding for Forums
Adding for Threads
Adding for Posts
Installing Bean : Forums
Table already exists : forums (Due to previous installation trials...)
Installing Bean : Threads
Table already exists : threads
Installing Bean : Posts
Table already exists : posts
Installing Bean : ForumTopics
Table already exists : forumtopics
Rebuilding Relationships
But does neither return to the module loader nor shows the module as "installed". BUT in the Admin-Section I see the ForumTopic panel...

Is it now working completely as it should only uninstallable (regardless of stating otherwise in the module loader)? Or did it not run completely through?