Most of these I’ve spent a lot of time on and they're repeatable, but that doesn’t mean I couldn’t miss something elementary. I’ve included a current work-around if available. All of these that I've checked are still present in v2.27p5 but I haven't rechecked each one of them.
2.21p4 Object Editor standard shapes
Missing default shapes in the Object Editor cause it to crash when you select one and try to install it into your tile.
2.27p5 Make Map
As reported by Fester, the Make Map feature sets all land to blue, and is using the grndtyp.bmp to build it instead of the waterd or cmpwater.bmp file. Maybe this isn't a bug, but blue water and green(?) land would make it more clearly deliberate.
2.27p5 Waypoints trashing gun positions in fleets
In both 2.27p5 and 2.26, when adding ships to a fleet, we can arrange it so that all the ships and gun positions show in the correct relationship in the hanger when the res file if built without waypoints. All gun positions are correctly displayed and you will spawn into the correct gun position. Setting waypoints and rebuilding the terrain trashes the hanger view which scrambles the relative position the ships.
2.27p5 Waypoints
The inability to set waypoints in v2.27p5 is what lead to the understanding of what was trashing the hanger view when adding extra ships. If the server can no longer handle extra ships, please notify us, thanks.
v2.26 Country rotation on the server
When uploading a terrain to the custom arena or having Skuzzy build it, the countries become rotated; Bish becomes Knit, Knit becomes Rook and Rook becomes Bish. As A1 must be Bish in the TE, there is no work-around. This causes inconsistencies when providing an AvA terrain with the preferred country arrangement.
2.26 Default terrain planeset not working
After 8+ hours of effort in version 2.26p?, I can’t make planesets in Setting Fields work. Inspection of the .pln file shows that it will not accept Rook (000-0100 converted from ascii 4) as a valid country for setting planesets. I saw that instead of setting a value of 1 for Bish, it set the value as Y, etc.
2.26 Check Objects / Check for errors
The Check Objects button sometimes caused the TE to crash. The work-a-round was to always run Check for errors under the file menu first, then run Check Objects. Check for errors reports missing HQs and Fields even when they exist, until after Check Objects is run, which clears the HQ/Fields errors. Running Check for errors a second time might also fix it.
2.27p5 Off map crash
In v2.27p5 this was sort of fixed, but when you move your view position off-map, it still crashes the TE. When drawing water or setting ground type along the edges of a 512 terrain, south edge, the TE crashes. Work-around: do all the editing in the grndtyp.bmp and waterd.bmp files. Also avoid setting bases too close to the edge, tracks and roads become risky procedures when you do.
2.26 Manned guns
The last manned gun position fails to show in the hanger on custom fields. This is still a large improvement over the old first gun not showing.
2.26 Stray spawn point circles
After save or build, spawn point / entry point circles appear in the wrong place or on top of custom objects placed in the terrain. Re-opening the terrain without quitting, will usually fix it.
2.27p5 Horizontal window slider
The horizontal window slider causes movement in the opposite direction normally expected. This is a long time bug.
2.27p5
Reminder - the ground textures weren't showing in uploaded terrains on the server.
Wish
Not really an error. There’s no way to install custom objects such as the Cliffs of Dover because of the Object on non level terrain error message. An advanced builder (who understands what he’s doing) should be able to override this error message and provide the level of visuals you’d like to see included in the game. Especially for screenshots on the front page.