Hello.
I'm very fond of Geany, but there is still one big inconvenience for me (and for most people using 4-spaces indent):
Lyrical digression: The standard indentation width for Perl (see perlstyle) is 4 spaces. Most of the CPAN modules are written using this rule.
In Geany it is VERY inconvenient to use 4-space indentations. If I change TAB width to 4 spaces then all tabs are DISPLAYED as 4 spaces. So, well-formatted documents, created assuming standard 8-space tabs, becomes twisted and hardly readable. So, I can't just set 4-spaces (or any other value besides 8) as tab width in Geany.
It will be very convenient if there will be 2 separate settings for DISPLAY and EDIT tab width.
So, I can leave DISPLAY TAB WIDTH 8 spaces and set EDIT TAB WIDTH to 4 spaces.
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Also, there is one more solution for the people using 4-space indentation. This feature is called HALF-TAB. Here is a quote from Midnight Commander editor (mcedit) manual page: "This will emulate a half tab for those who want to program with a tab spacing of 4, but do not want the tab size changed from 8 (so that the code will be formatted the same when displayed by other programs). When editing between text and the left margin, moving and tabbing will be as though a tab space were 4, while actually using spaces and normal tabs for an optimal fill. When editing anywhere else, a normal tab is inserted."
So mcedit-like half tabs is another solution for the problem.