Just log it???
While doing testing I often found some bugs which gives me some clue about why it occurred in the first place. Being a tester do we just need to find an issue/bug and report it or should not we do some initial investigation on the bug (homework) before logging it. As per my understanding bugs are a result of misunderstood functionality, edge scenarios which was not thought of during development, improper data handling and finally the border issue (integration point with some other story).
So being a tester we should not only find bugs but rather give inputs in such a way that it helps the developer figure out the fix in a faster way. Implementation of logging in the application is one such attempt where we can guide the development team for more informative logging. Exceptions should not be suppressed while logging also it should not be overloaded. In case of Data handling issues, QAs should be proactive enough to put some effort of playing around with more varied set of data so as to find out if there is any pattern in the data handling.
The role of tester should not limit to just finding a bug but also to help in getting it fixed faster(directly or indirectly :) ).