I found a few bugs.

1. Conflict with Thaumcraft 3 mod.
   If you connect 2 mirrors (I hope you know how they work) and aim at one of them, the game console spams an error of the following type:

[SEVERE] [Minecraft-Client] ########## GL ERROR ##########
[SEVERE] [Minecraft-Client] @ Post render
[SEVERE] [Minecraft-Client] 1283: Stack overflow

This blows up the .log file very quickly. But it doesn't seem to affect the performance of the game.

2. Conflict with InGame Info XML mod. Visual flickering bug.
   If you change the value in the BlockHelper.cfg file to something like:

    # Size factor for the tooltip
    D:Size=0.7

and aim at the mirror from TC3 again, then the font starts flickering. And some other interface elements from other mods. For example, HUD from Ars Magica.
It's just a combo :D After a game session you get a huge .log file.

Quick info about mirrors. Just in case.
https://www.youtube.com/watch?v=Qcq2kvknLdE

Definetly reproducible on my end, thanks for reporting these!
Actually, I don't even need to connect two mirrors. Just looking at any mirror already causes this behaviour.
I think I may know what's causing the issue, but I will try to investigate after I have successfully fixed the translator on every version :)

I double-checked. This bug is exactly with ZansMinimap1.5.2.zip. VoxelMap_1.5.2.u88.zip is really fine.
By the way, how are they different? Were they different developers?

I found another incompatibility with the ZansMinimap and Natura mods. If you look at ANY block where Ghostwood is visible (or at Ghostwood itself), some textures will start flickering. A workaround is to disable BlockHelper (Numpad 0)

Also another bug with tanks. This time it is “Pump Plus” from QuarryPlus-1.5.2-2.1.0.jar mod
https://sourceforge.net/projects/yogpstopmcmods/files/Release/jar/QuarryPlus/Minecraft%201.5.2/

I cannot reproduce the first bug on my machine (using Natura 2.1.5.1)..

And for the second bug, my screen looks a bit different... Completely normal /s

Zan's Minimap had a rough history:

1. MrMessiah released Simple Map back in September 2010 (his thread actually still exists: thread)
2. Notch complains that it uses copyrighted code (as basically 99% of all mods back then) and he needs to take it down - he also talks on Reddit about this: thread
3. Zaneris released Zan's Minimap back in November 2010 as a "more modern" replacement for it (his thread actually still exists: thread - however, this is the very old link: thread)
4. Lahwran took over the mod after Zan abandoned it (see his thread: thread)
5. Lahwran chooses to not update it anymore after b1.8.1, because "there is a better minimap" according to him (see: thread)
6. MamiyaOtaru takes over the mod in 2012 (thread - earliest link I am aware of: thread (there may be older links somewhere, but I don't know...))
7. At some point in 2013 - with the 1.5 release of the mod - he just decides to rename it to "VoxelMap", although the mod files themselves were still called "ZansMinimap" at this point
8. With the 1.7.x versions of the mod, even the file names were renamed to "VoxelMap" (see ML/Forge downloads here: PlanetMinecraft page)
9. This was the "golden era" of the mod - it was updated consistently by the same creator until 2021
10. After it was clear that MamiyaOtaru has also discontinued it (although I was not aware of any public announcement from him at that time... Was there any?), fantahud/fantahund99 began posting comments on the CurseForge page, offering downloads for VoxelMap versions for newer MC versions (in 2022-ish)
11. His port evolved first into a Discord server project and then into a properly released mod, which is still updated to this day: Modrinth page

TL;DR: There is literally no difference except for a name change :)

Edit: And sorry, I didn't even answer your bug report: good to know that VoxelMap apparently works! Maybe, this is a compatibility issue then, which should get fixed along with the magic mirror etc.

Indeed, and no problem! It's always nice to be able to write down all this info somewhere where it fits - it's an important piece of history that ought to be archived somewhere :)

Actually, the same goes for me! I have never liked MapWriter (which was pre-installed in Hexxit, for example) and swapped it out for Zan's Minimap/VoxelMap... But yeah, the functionality for a "World Map" as Xearo calls it is really nice :D

So many people were behind this mod... That was interesting to read, thanks.
It's like game companies when developers leave them and create their own companies and new games. You play them and you don't even know that they also made your favorite games. Something like that.

I've always liked VoxelMap, it has a very simple and uncluttered interface. Whenever I feel like playing older versions of Minecraft, I always install it. The creators of this mod even provided the ability to install custom icons of mobs, if something is not displayed on the minimap. It's a shame that on version 1.5.2 there was no full screen map yet. I have to use an additional second map - MapWriter XD

GregTech tesseract and lava :)

All these bugs should be fixed in 2.0.0-pre1 :)