Since 1.7.10, there are some changes come to the Minecraft GUI scale ratio calculation, which makes many small text unable to read and distinguish in Unicode font mode. If you plays the game by setting the option "Force Unicode Font" to "ON" or under a Unicode-only language environment like Chinese or Japanese, you will meet this annoying problem.

For example, this is what you can see though a thaumometer in Unicode font mode:

Look at the popup messages in the lower right corner. Too bad, right? I have reported these issues to many mod authors to convince them to enlarge the small text in their mod. Many authors have updated their mods, but there are still some mods I need to fix by myself.

Unicode Font Fixer is a mod to fix broken text caused by small Unicode font (those text with < 1.0 OpenGL scale ratio).

Currently it supports the following mods:

Thaumcraft 4
Forestry 3
Steve's Factory Manager
Hardcore Questing Mode
Modular Powersuits
Traveller's Gear
Automagy
Electrical Age
Mine Trading Cards
Tinker's Construct
BiblioCraft
Applied Energistics 2
Thaumic Horizons
Better Records
The Lord of the Rings Mod
ArchitectureCraft
PneumaticCraft
Botania
Mekanism

Misc Notes:

Open Blocks: The font size issue in handbook has already got fixed internally in the newest verion. Check the language file (*.lang) and you will find the config option for it.

If you want send me a request to add support to some other mods. Please follow the steps below:

Launch Minecraft, with the mods you want to get supported and the Unicode Font Fixer mod installed.
Play the game for a while. Be sure to open all (or at least all of you know) GUIs with broken text.
Send me the fml-client-latest.log in .minecraft\logs\ directory, or just post those lines with "unicodefontfixer.RenderingDebugger" in the log file.

After installing the mod, the popup messages will get an appropriate font size:

In addition to this example, the Unicode Font Fixer mod will fix every broken text in the mods listed above.

About modpack:

Feel free to include this mod in your pack. It will be nice if you put a short introduction and a link to this mod in your modpack publish site/threads.

Other mods you may like:

Better Auto Jump: Auto-jump when holding Sprint key.
No Mob Spawning on Trees: A mob spawn control mod with easy and powerful configurations.
Light Level Overlay Reloaded: Visualizes the light level on top of blocks.