Let's assume that either a bug report exists already, or the problem is unlikely to be caused by a bug.
What I know so far is:
- This site will be appropriate for some support questions, and the mechanism for the site encourages peer review of each answer. Here's an example of a support question.
- The bitcointalk forums have a technical support category that is likely to give a good response as there are lots of active users.
Where else might I get timely support? (paid or unpaid)