No worries old mate.
What brand of ibuprofen/codeine are you using? I always use Panafen Plus, as they dissolve very easily (i.e. you don't have to crush/grind the tablets prior to adding water), I usually just throw them in a water bottle, 100mL of cold water, pop the lid on and shake vigorously and they're all dissolved in about 5 minutes. If you add an ice cube or two it helps them dissolve quicker when shaking, for obvious reasons.
I always filter my solution very carefully, and you're right, with the ibuprofen/codeine preparations after filtering the solution is almost always cloudy. However, this is unlikely to be ibuprofen in the solution, but other inactive insolubles contained within the tablet such as binders and fillers, unless of course you used an excessive amount of water or a poor filter that failed to catch the undissolved solids. Also, ibuprofen is significantly less soluble in cold water than paracetamol, so it is safer by definition. Not to mention it is no where near as hepatoxic as paracetamol, ibuprofen is just really rough on the stomach. So if you do somehow manage to botch an extraction of ibuprofen based tablets, though I really don't understand how you could, after all it's not rocket science, then the ibuprofen is going to be far less damaging to your body.

Unless you're prone to stomach problems, ulcers, etc. of course.
Also, don't get me wrong, I am not suggesting extracting a safe dose of codeine from a preparation containing an unsafe amount of paracetamol or ibuprofen is safe at all. This is why it is important to understand how the process actually works, don't rush it and pay attention to what you are doing - then you can greatly minimize the risk of a dangerous outcome.
Ash.