Saw this in patch 1.01 and it's in 1.2 patch, too:
Checking the labor resources - Carthago
Total Plebs Needed: Have - 3504 versus Need - 3544
Unemployed Plebs: 56
Always seems be in industry that reads low in the 'Have' column. However, the plebs are available, at least when I place a new industry, farm, or raw material camp they fill the vacancies.
Also, while playing Carthago, I missed a request of wool, but it gave me another 4yrs 6 months to fill it. However it never showed up on the Imperial request list. I would think it should have been listed as an outstanding request. Even 4 yrs out...which seems a bit much - mho.
Lost my HD a few weeks ago, after re-loading C-IV, I went directly to the new patch - English version - without any problems. Overall I'm quite happy with the patch, especially being able to turn off the weather.