I have an assembly drawing on which I'd like to place a few weld symbols. However, after I place the symbol, I can't click on it - like it's not there. If I rebuild weld symbols disappear altogether. This particular drawing does the same thing on a coworker's workstation as well. However, if he starts a new drawing weld symbols behave normally. We don't use the same templates, so this points to a difference in document properties, but I can't think of a document property that whould make weld symbols unusable.