Well, as a whole I'm not a fan of tablets for anything. The hard pressing and coatings used to bind all the materials together tell me that they are not as easily broken down as thin gelatin caps. I remember Benz posting about a guy he talked to who owned port-a-potties, and he said the guy had to install screens to filter out some tabs that never fully digested and passed through.
Those are my feelings on the negatives of tablets, but it has to be put in perspective. I think that if one is feeling some form of effect from liver tabs (i.e. increased energy, less fatigue during workouts) than they shouldn't be as concerned about digestion, as they must be digesting to give any effect. Granted some users report increased energy and some do not, and we know the effects of liver tabs are not exactly "directly" observed for the most part. I'm assuming that some people can't digest the tabs as well as others, and for them I'd recommend adding digestive enzmes to their diet, maybe some kind of insurance.
I do think the best way to take them is to chew them, but most can't stomach it. I tried, did OK, but just can't get used to it. I now just try to take them after eating in hopes that they stay in the digestive track longer and are given more time to breakdown. Also I use enzymes myself (thanks for the idea Jake), and they seem to help with gas anyway. I will try to look up some data on tablets vs caps digestion studies, see if I can find anything. That's my 2 cents
