Has the error been reported through the Bug Tracker?
"Please report all bugs in the Bug Tracker. Before posting any issue as a bug, please check the existing bug list as someone else may have already reported the same bug or issue. Clickteam Programmers are specifically assigned their own list of bugs to combat so posting your bugs on the forum may result in your bug not even been reviewed by the Clickteam programmers." (source)
Edit: If you are not using the latest version of Fusion 2.5 you could also try that out, as the problem may have already been resolved.