Created attachment 55469 [details]
some screenshots that show the issue

Hi all,

I have installed regnum online in my two computers with a Radeon x1650pro (AGP)
and the other one has a HD 4670 PciX, Both are using this driver

OpenGL version string: 2.1 Mesa 8.0-devel (git-3235435 oneiric-oibaf-ppa)
OpenGL shading language version string: 1.20

but is the same with all versions of mesa 7.12 and 7.11

the game only can be playable with safe mode. if fixed or shader 2 mode are selected, some textures flickering like the screenshots show.

if safe mode is enabled the only error message is:

Mesa: User error: GL_INVALID_OPERATION in glBindTexture(target mismatch)

but everything is ok inside the game,

by deactivating safe mode:

Mesa: User error: GL_INVALID_OPERATION in glCompressedTexImage2D(invalid width or height for compression format)
Mesa: User error: GL_INVALID_OPERATION in glTexParameter(param=-1)
Mesa warning: glDraw[Range]Elements(start 5358, end 5754, count 396, type 0x1403, indices=0x29dc)
	end is out of bounds (max=2943)  Element Buffer 384 (size 11508)
	This should probably be fixed in the application.
Mesa warning: glDraw[Range]Elements(start 3558, end 5358, count 1800, type 0x1403, indices=0x1bcc)
	end is out of bounds (max=2943)  Element Buffer 384 (size 11508)
	This should probably be fixed in the application.
Mesa warning: glDraw[Range]Elements(start 14592, end 16122, count 1530, type 0x1403, indices=0x7200)

any further question, just let me know

thanks in advance