2.29.2 Greatest hits from previous weeks

Greatest hits from previous weeks:

2.29.2.1 Error in TeX Live a^\200\223 Font ... not loadable: Metric (TFM) file not found

http://tex.stackexchange.com/questions/75166/error-in-tex-live-font-not-loadable-metric-tfm-file-not-found

I freshly installed 'basic' version of TeX Live 2012 (not full, only basic version). 
I have following line in my code: 
\usepackage[T1]{fontenc} 
I get following error: 
...
 

- asked by abhinavkulkarni (67 votes), answered by mpg (53 votes)

2.29.2.2 How can I get bold math symbols?

http://tex.stackexchange.com/questions/595/how-can-i-get-bold-math-symbols

To make Latin-letter variables bold I can use e.g. \mathbf{a}, but while putting Greek letters or symbols such as \nabla inside \mathbf doesn't cause any errors or warnings, it also doesn't do  ...
 

- asked by Michael Underwood (207 votes), answered by Mark Meckes (179 votes)